Change semantic of CONFIG_*, HAVE_* and ARCH_*.

They are now always defined to either 0 or 1.

Originally committed as revision 16590 to svn://svn.ffmpeg.org/ffmpeg/trunk

154 files changed, 757 insertions, 749 deletions

diff --git a/cmdutils.c b/cmdutils.c
index 32ffefaf3b..20291aaba4 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -30,19 +30,19 @@
 
 #include "config.h"
 #include "libavformat/avformat.h"
-#ifdef CONFIG_AVFILTER
+#if CONFIG_AVFILTER
 #include "libavfilter/avfilter.h"
 #endif
 #include "libavdevice/avdevice.h"
 #include "libswscale/swscale.h"
-#ifdef CONFIG_POSTPROC
+#if CONFIG_POSTPROC
 #include "libpostproc/postprocess.h"
 #endif
 #include "libavutil/avstring.h"
 #include "libavcodec/opt.h"
 #include "cmdutils.h"
 #include "version.h"
-#ifdef CONFIG_NETWORK
+#if CONFIG_NETWORK
 #include "libavformat/network.h"
 #endif
 
@@ -255,7 +255,7 @@ void print_error(const char *filename, int err)
     case AVERROR(ENOENT):
         fprintf(stderr, "%s: no such file or directory\n", filename);
         break;
-#ifdef CONFIG_NETWORK
+#if CONFIG_NETWORK
     case AVERROR(FF_NETERROR(EPROTONOSUPPORT)):
         fprintf(stderr, "%s: Unsupported network protocol\n", filename);
         break;
@@ -279,13 +279,13 @@ static void print_all_lib_versions(FILE* outstream, int indent)
     PRINT_LIB_VERSION(outstream, avcodec,  AVCODEC,  indent);
     PRINT_LIB_VERSION(outstream, avformat, AVFORMAT, indent);
     PRINT_LIB_VERSION(outstream, avdevice, AVDEVICE, indent);
-#ifdef CONFIG_AVFILTER
+#if CONFIG_AVFILTER
     PRINT_LIB_VERSION(outstream, avfilter, AVFILTER, indent);
 #endif
-#ifdef CONFIG_SWSCALE
+#if CONFIG_SWSCALE
     PRINT_LIB_VERSION(outstream, swscale,  SWSCALE,  indent);
 #endif
-#ifdef CONFIG_POSTPROC
+#if CONFIG_POSTPROC
     PRINT_LIB_VERSION(outstream, postproc, POSTPROC, indent);
 #endif
 }
@@ -311,7 +311,7 @@ void show_version(void) {
 
 void show_license(void)
 {
-#ifdef CONFIG_NONFREE
+#if CONFIG_NONFREE
     printf(
     "This version of %s has nonfree parts compiled in.\n"
     "Therefore it is not legally redistributable.\n",
diff --git a/configure b/configure
index 8c3cafe359..cd49d4ce14 100755
--- a/configure
+++ b/configure
@@ -430,6 +430,7 @@ print_config(){
             echo "#define ENABLE_${ucname} 1" >> $header
             echo "${pfx}${ucname}=yes" >> $makefile
         else
+            echo "#define ${pfx}${ucname} 0" >> $header
             echo "#define ENABLE_${ucname} 0" >> $header
         fi
     done
diff --git a/doc/faq.texi b/doc/faq.texi
index e070fd2938..0d923a48e0 100644
--- a/doc/faq.texi
+++ b/doc/faq.texi
@@ -426,7 +426,7 @@ you need the debug information, used the *_g versions.
 @section I do not like the LGPL, can I contribute code under the GPL instead?
 
 Yes, as long as the code is optional and can easily and cleanly be placed
-under #ifdef CONFIG_GPL without breaking anything. So for example a new codec
+under #if CONFIG_GPL without breaking anything. So for example a new codec
 or filter would be OK under GPL while a bug fix to LGPL code would not.
 
 @section I want to compile xyz.c alone but my compiler produced many errors.
diff --git a/ffmpeg.c b/ffmpeg.c
index 0f6bb24a61..4003a56c33 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -41,23 +41,23 @@
 #include "libavutil/avstring.h"
 #include "libavformat/os_support.h"
 
-#ifdef HAVE_SYS_RESOURCE_H
+#if HAVE_SYS_RESOURCE_H
 #include <sys/types.h>
 #include <sys/resource.h>
-#elif defined(HAVE_GETPROCESSTIMES)
+#elif HAVE_GETPROCESSTIMES
 #include <windows.h>
 #endif
 
-#ifdef HAVE_SYS_SELECT_H
+#if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 
-#ifdef HAVE_TERMIOS_H
+#if HAVE_TERMIOS_H
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <sys/time.h>
 #include <termios.h>
-#elif defined(HAVE_CONIO_H)
+#elif HAVE_CONIO_H
 #include <conio.h>
 #endif
 #undef time //needed because HAVE_AV_CONFIG_H is defined on top
@@ -295,7 +295,7 @@ typedef struct AVInputFile {
     int nb_streams;       /* nb streams we are aware of */
 } AVInputFile;
 
-#ifdef HAVE_TERMIOS_H
+#if HAVE_TERMIOS_H
 
 /* init terminal so that we can grab keys */
 static struct termios oldtty;
@@ -303,7 +303,7 @@ static struct termios oldtty;
 
 static void term_exit(void)
 {
-#ifdef HAVE_TERMIOS_H
+#if HAVE_TERMIOS_H
     tcsetattr (0, TCSANOW, &oldtty);
 #endif
 }
@@ -319,7 +319,7 @@ sigterm_handler(int sig)
 
 static void term_init(void)
 {
-#ifdef HAVE_TERMIOS_H
+#if HAVE_TERMIOS_H
     struct termios tty;
 
     tcgetattr (0, &tty);
@@ -344,7 +344,7 @@ static void term_init(void)
     register a function to be called at normal program termination
     */
     atexit(term_exit);
-#ifdef CONFIG_BEOS_NETSERVER
+#if CONFIG_BEOS_NETSERVER
     fcntl(0, F_SETFL, fcntl(0, F_GETFL) | O_NONBLOCK);
 #endif
 }
@@ -352,10 +352,10 @@ static void term_init(void)
 /* read a key without blocking */
 static int read_key(void)
 {
-#if defined(HAVE_TERMIOS_H)
+#if HAVE_TERMIOS_H
     int n = 1;
     unsigned char ch;
-#ifndef CONFIG_BEOS_NETSERVER
+#if !CONFIG_BEOS_NETSERVER
     struct timeval tv;
     fd_set rfds;
 
@@ -372,7 +372,7 @@ static int read_key(void)
 
         return n;
     }
-#elif defined(HAVE_CONIO_H)
+#elif HAVE_CONIO_H
     if(kbhit())
         return(getch());
 #endif
@@ -427,7 +427,7 @@ static int av_exit(int ret)
 
     av_free(video_standard);
 
-#ifdef CONFIG_POWERPC_PERF
+#if CONFIG_POWERPC_PERF
     void powerpc_display_perf_report(void);
     powerpc_display_perf_report();
 #endif /* CONFIG_POWERPC_PERF */
@@ -2553,7 +2553,7 @@ static void opt_top_field_first(const char *arg)
 static int opt_thread_count(const char *opt, const char *arg)
 {
     thread_count= parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
-#if !defined(HAVE_THREADS)
+#if !HAVE_THREADS
     if (verbose >= 0)
         fprintf(stderr, "Warning: not compiled with thread support, using thread emulation\n");
 #endif
@@ -2626,7 +2626,7 @@ static void opt_video_tag(const char *arg)
         video_codec_tag= arg[0] + (arg[1]<<8) + (arg[2]<<16) + (arg[3]<<24);
 }
 
-#ifdef CONFIG_VHOOK
+#if CONFIG_VHOOK
 static void add_frame_hooker(const char *arg)
 {
     int argc = 0;
@@ -3416,12 +3416,12 @@ static void opt_pass(const char *pass_str)
 
 static int64_t getutime(void)
 {
-#ifdef HAVE_GETRUSAGE
+#if HAVE_GETRUSAGE
     struct rusage rusage;
 
     getrusage(RUSAGE_SELF, &rusage);
     return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
-#elif defined(HAVE_GETPROCESSTIMES)
+#elif HAVE_GETPROCESSTIMES
     HANDLE proc;
     FILETIME c, e, k, u;
     proc = GetCurrentProcess();
@@ -3828,7 +3828,7 @@ static const OptionDef options[] = {
     { "psnr", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&do_psnr}, "calculate PSNR of compressed frames" },
     { "vstats", OPT_EXPERT | OPT_VIDEO, {(void*)&opt_vstats}, "dump video coding statistics to file" },
     { "vstats_file", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_vstats_file}, "dump video coding statistics to file", "file" },
-#ifdef CONFIG_VHOOK
+#if CONFIG_VHOOK
     { "vhook", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)add_frame_hooker}, "insert video processing module", "module" },
 #endif
     { "intra_matrix", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_intra_matrix}, "specify intra matrix coeffs", "matrix" },
diff --git a/ffplay.c b/ffplay.c
index 218ea6d102..88e6b1a143 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -2019,7 +2019,7 @@ static int decode_thread(void *arg)
             else
                 av_read_play(ic);
         }
-#if defined(CONFIG_RTSP_DEMUXER) || defined(CONFIG_MMSH_PROTOCOL)
+#if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
         if (is->paused &&
                 (!strcmp(ic->iformat->name, "rtsp") ||
                  (ic->pb && !strcmp(url_fileno(ic->pb)->prot->name, "mmsh")))) {
@@ -2467,7 +2467,7 @@ static int opt_vismv(const char *opt, const char *arg)
 static int opt_thread_count(const char *opt, const char *arg)
 {
     thread_count= parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
-#if !defined(HAVE_THREADS)
+#if !HAVE_THREADS
     fprintf(stderr, "Warning: not compiled with thread support, using thread emulation\n");
 #endif
     return 0;
@@ -2579,7 +2579,7 @@ int main(int argc, char **argv)
     }
 
     if (!display_disable) {
-#ifdef HAVE_SDL_VIDEO_SIZE
+#if HAVE_SDL_VIDEO_SIZE
         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
         fs_screen_width = vi->current_w;
         fs_screen_height = vi->current_h;
diff --git a/ffserver.c b/ffserver.c
index 231697eec5..4736e2dac5 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -22,7 +22,7 @@
 #define _XOPEN_SOURCE 600
 
 #include "config.h"
-#ifndef HAVE_CLOSESOCKET
+#if !HAVE_CLOSESOCKET
 #define closesocket close
 #endif
 #include <string.h>
@@ -41,7 +41,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/ioctl.h>
-#ifdef HAVE_POLL_H
+#if HAVE_POLL_H
 #include <poll.h>
 #endif
 #include <errno.h>
@@ -50,7 +50,7 @@
 #include <time.h>
 #include <sys/wait.h>
 #include <signal.h>
-#ifdef HAVE_DLFCN_H
+#if HAVE_DLFCN_H
 #include <dlfcn.h>
 #endif
 
@@ -3709,7 +3709,7 @@ static enum CodecID opt_video_codec(const char *arg)
 
 /* simplistic plugin support */
 
-#ifdef HAVE_DLOPEN
+#if HAVE_DLOPEN
 static void load_module(const char *filename)
 {
     void *dll;
@@ -4394,7 +4394,7 @@ static int parse_ffconfig(const char *filename)
             }
         } else if (!strcasecmp(cmd, "LoadModule")) {
             get_arg(arg, sizeof(arg), &p);
-#ifdef HAVE_DLOPEN
+#if HAVE_DLOPEN
             load_module(arg);
 #else
             fprintf(stderr, "%s:%d: Module support not compiled into this version: '%s'\n",
diff --git a/libavcodec/aac.c b/libavcodec/aac.c
index 545f1254dd..6150c309c8 100644
--- a/libavcodec/aac.c
+++ b/libavcodec/aac.c
@@ -435,7 +435,7 @@ static av_cold int aac_decode_init(AVCodecContext * avccontext) {
         ac->sf_offset = 60;
     }
 
-#ifndef CONFIG_HARDCODED_TABLES
+#if !CONFIG_HARDCODED_TABLES
     for (i = 0; i < 428; i++)
         ff_aac_pow2sf_tab[i] = pow(2, (i - 200)/4.);
 #endif /* CONFIG_HARDCODED_TABLES */
diff --git a/libavcodec/aactab.c b/libavcodec/aactab.c
index 3eab636cc4..76f9bbc624 100644
--- a/libavcodec/aactab.c
+++ b/libavcodec/aactab.c
@@ -899,7 +899,7 @@ const float * const ff_aac_codebook_vectors[] = {
     codebook_vector8, codebook_vector10,
 };
 
-#ifdef CONFIG_HARDCODED_TABLES
+#if CONFIG_HARDCODED_TABLES
 
 /**
  * Table of pow(2, (i - 200)/4.) used for different purposes depending on the
diff --git a/libavcodec/aactab.h b/libavcodec/aactab.h
index 07574d8da7..2a8491bc88 100644
--- a/libavcodec/aactab.h
+++ b/libavcodec/aactab.h
@@ -65,7 +65,7 @@ extern const uint16_t  ff_aac_spectral_sizes[11];
 
 extern const float *ff_aac_codebook_vectors[];
 
-#ifdef CONFIG_HARDCODED_TABLES
+#if CONFIG_HARDCODED_TABLES
 extern const float ff_aac_pow2sf_tab[316];
 #else
 extern       float ff_aac_pow2sf_tab[316];
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index c4fb3eeb6d..b13a376ea3 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -153,7 +153,7 @@ typedef struct ADPCMContext {
 
 /* XXX: implement encoding */
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 static int adpcm_encode_init(AVCodecContext *avctx)
 {
     if (avctx->channels > 2)
@@ -1589,7 +1589,7 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
 
 
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 #define ADPCM_ENCODER(id,name,long_name_)       \
 AVCodec name ## _encoder = {                    \
     #name,                                      \
@@ -1607,7 +1607,7 @@ AVCodec name ## _encoder = {                    \
 #define ADPCM_ENCODER(id,name,long_name_)
 #endif
 
-#ifdef CONFIG_DECODERS
+#if CONFIG_DECODERS
 #define ADPCM_DECODER(id,name,long_name_)       \
 AVCodec name ## _decoder = {                    \
     #name,                                      \
diff --git a/libavcodec/alpha/dsputil_alpha_asm.S b/libavcodec/alpha/dsputil_alpha_asm.S
index dbdf279baf..57b21fca12 100644
--- a/libavcodec/alpha/dsputil_alpha_asm.S
+++ b/libavcodec/alpha/dsputil_alpha_asm.S
@@ -53,7 +53,7 @@ put_pixels_axp_asm:
         .frame sp, 0, ra
         .prologue 0
 
-#ifdef CONFIG_GPROF
+#if CONFIG_GPROF
         lda     AT, _mcount
         jsr     AT, (AT), _mcount
 #endif
@@ -150,7 +150,7 @@ put_pixels_clamped_mvi_asm:
         .frame sp, 0, ra
         .prologue 0
 
-#ifdef CONFIG_GPROF
+#if CONFIG_GPROF
         lda     AT, _mcount
         jsr     AT, (AT), _mcount
 #endif
@@ -205,7 +205,7 @@ add_pixels_clamped_mvi_asm:
         .frame sp, 0, ra
         .prologue 0
 
-#ifdef CONFIG_GPROF
+#if CONFIG_GPROF
         lda     AT, _mcount
         jsr     AT, (AT), _mcount
 #endif
diff --git a/libavcodec/alpha/motion_est_mvi_asm.S b/libavcodec/alpha/motion_est_mvi_asm.S
index cdf40b1f36..db1e30d424 100644
--- a/libavcodec/alpha/motion_est_mvi_asm.S
+++ b/libavcodec/alpha/motion_est_mvi_asm.S
@@ -55,7 +55,7 @@ pix_abs16x16_mvi_asm:
         .frame sp, 0, ra, 0
         .prologue 0
 
-#ifdef CONFIG_GPROF
+#if CONFIG_GPROF
         lda     AT, _mcount
         jsr     AT, (AT), _mcount
 #endif
diff --git a/libavcodec/arm/asm.S b/libavcodec/arm/asm.S
index 0aa1639998..69d83488ad 100644
--- a/libavcodec/arm/asm.S
+++ b/libavcodec/arm/asm.S
@@ -38,7 +38,7 @@
         .endm
 
         .macro movrel rd, val
-#if defined(HAVE_ARMV6T2) && !defined(CONFIG_SHARED)
+#if HAVE_ARMV6T2 && !CONFIG_SHARED
         movw            \rd, #:lower16:\val
         movt            \rd, #:upper16:\val
 #else
diff --git a/libavcodec/arm/dsputil_arm.c b/libavcodec/arm/dsputil_arm.c
index eaa6b9eb8d..a91ca13141 100644
--- a/libavcodec/arm/dsputil_arm.c
+++ b/libavcodec/arm/dsputil_arm.c
@@ -20,7 +20,7 @@
  */
 
 #include "libavcodec/dsputil.h"
-#ifdef HAVE_IPP
+#if HAVE_IPP
 #include <ipp.h>
 #endif
 
@@ -93,7 +93,7 @@ static void simple_idct_ARM_add(uint8_t *dest, int line_size, DCTELEM *block)
     ff_add_pixels_clamped(block, dest, line_size);
 }
 
-#ifdef HAVE_IPP
+#if HAVE_IPP
 static void simple_idct_ipp(DCTELEM *block)
 {
     ippiDCT8x8Inv_Video_16s_C1I(block);
@@ -108,7 +108,7 @@ void add_pixels_clamped_iwmmxt(const DCTELEM *block, uint8_t *pixels, int line_s
 static void simple_idct_ipp_add(uint8_t *dest, int line_size, DCTELEM *block)
 {
     ippiDCT8x8Inv_Video_16s_C1I(block);
-#ifdef HAVE_IWMMXT
+#if HAVE_IWMMXT
     add_pixels_clamped_iwmmxt(block, dest, line_size);
 #else
     ff_add_pixels_clamped_ARM(block, dest, line_size);
@@ -130,13 +130,13 @@ void dsputil_init_arm(DSPContext* c, AVCodecContext *avctx)
 
     if (avctx->lowres == 0) {
         if(idct_algo == FF_IDCT_AUTO){
-#if defined(HAVE_IPP)
+#if   HAVE_IPP
             idct_algo = FF_IDCT_IPP;
-#elif defined(HAVE_NEON)
+#elif HAVE_NEON
             idct_algo = FF_IDCT_SIMPLENEON;
-#elif defined(HAVE_ARMV6)
+#elif HAVE_ARMV6
             idct_algo = FF_IDCT_SIMPLEARMV6;
-#elif defined(HAVE_ARMV5TE)
+#elif HAVE_ARMV5TE
             idct_algo = FF_IDCT_SIMPLEARMV5TE;
 #else
             idct_algo = FF_IDCT_ARM;
@@ -153,28 +153,28 @@ void dsputil_init_arm(DSPContext* c, AVCodecContext *avctx)
             c->idct_add= simple_idct_ARM_add;
             c->idct    = simple_idct_ARM;
             c->idct_permutation_type= FF_NO_IDCT_PERM;
-#ifdef HAVE_ARMV6
+#if HAVE_ARMV6
         } else if (idct_algo==FF_IDCT_SIMPLEARMV6){
             c->idct_put= ff_simple_idct_put_armv6;
             c->idct_add= ff_simple_idct_add_armv6;
             c->idct    = ff_simple_idct_armv6;
             c->idct_permutation_type= FF_LIBMPEG2_IDCT_PERM;
 #endif
-#ifdef HAVE_ARMV5TE
+#if HAVE_ARMV5TE
         } else if (idct_algo==FF_IDCT_SIMPLEARMV5TE){
             c->idct_put= simple_idct_put_armv5te;
             c->idct_add= simple_idct_add_armv5te;
             c->idct    = simple_idct_armv5te;
             c->idct_permutation_type = FF_NO_IDCT_PERM;
 #endif
-#ifdef HAVE_IPP
+#if HAVE_IPP
         } else if (idct_algo==FF_IDCT_IPP){
             c->idct_put= simple_idct_ipp_put;
             c->idct_add= simple_idct_ipp_add;
             c->idct    = simple_idct_ipp;
             c->idct_permutation_type= FF_NO_IDCT_PERM;
 #endif
-#ifdef HAVE_NEON
+#if HAVE_NEON
         } else if (idct_algo==FF_IDCT_SIMPLENEON){
             c->idct_put= ff_simple_idct_put_neon;
             c->idct_add= ff_simple_idct_add_neon;
@@ -201,17 +201,17 @@ void dsputil_init_arm(DSPContext* c, AVCodecContext *avctx)
     c->put_no_rnd_pixels_tab[1][2] = put_no_rnd_pixels8_y2_arm;
     c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_arm;
 
-#ifdef HAVE_ARMV5TE
+#if HAVE_ARMV5TE
     c->prefetch = ff_prefetch_arm;
 #endif
 
-#ifdef HAVE_IWMMXT
+#if HAVE_IWMMXT
     dsputil_init_iwmmxt(c, avctx);
 #endif
-#ifdef HAVE_ARMVFP
+#if HAVE_ARMVFP
     ff_float_init_arm_vfp(c, avctx);
 #endif
-#ifdef HAVE_NEON
+#if HAVE_NEON
     ff_dsputil_init_neon(c, avctx);
 #endif
 }
diff --git a/libavcodec/arm/dsputil_arm_s.S b/libavcodec/arm/dsputil_arm_s.S
index 639b7b8af8..9425d33286 100644
--- a/libavcodec/arm/dsputil_arm_s.S
+++ b/libavcodec/arm/dsputil_arm_s.S
@@ -24,12 +24,12 @@
 
         preserve8
 
-#ifndef HAVE_PLD
+#if !HAVE_PLD
 .macro pld reg
 .endm
 #endif
 
-#ifdef HAVE_ARMV5TE
+#if HAVE_ARMV5TE
 function ff_prefetch_arm, export=1
         subs    r2, r2, #1
         pld     [r0]
diff --git a/libavcodec/arm/dsputil_vfp.S b/libavcodec/arm/dsputil_vfp.S
index 04c8014e1e..50cfd984a2 100644
--- a/libavcodec/arm/dsputil_vfp.S
+++ b/libavcodec/arm/dsputil_vfp.S
@@ -133,7 +133,7 @@ function ff_vector_fmul_reverse_vfp, export=1
         bx              lr
         .endfunc
 
-#ifdef HAVE_ARMV6
+#if HAVE_ARMV6
 /**
  * ARM VFP optimized float to int16 conversion.
  * Assume that len is a positive number and is multiple of 8, destination
diff --git a/libavcodec/arm/float_arm_vfp.c b/libavcodec/arm/float_arm_vfp.c
index 5598aa9c02..41a7c19994 100644
--- a/libavcodec/arm/float_arm_vfp.c
+++ b/libavcodec/arm/float_arm_vfp.c
@@ -29,7 +29,7 @@ void ff_float_init_arm_vfp(DSPContext* c, AVCodecContext *avctx)
 {
     c->vector_fmul = ff_vector_fmul_vfp;
     c->vector_fmul_reverse = ff_vector_fmul_reverse_vfp;
-#ifdef HAVE_ARMV6
+#if HAVE_ARMV6
     c->float_to_int16 = ff_float_to_int16_vfp;
 #endif
 }
diff --git a/libavcodec/arm/mathops.h b/libavcodec/arm/mathops.h
index e36316c76b..7a9d632195 100644
--- a/libavcodec/arm/mathops.h
+++ b/libavcodec/arm/mathops.h
@@ -38,7 +38,7 @@ static inline av_const int MULL(int a, int b, unsigned shift)
 }
 
 #define MULH MULH
-#ifdef HAVE_ARMV6
+#if HAVE_ARMV6
 static inline av_const int MULH(int a, int b)
 {
     int r;
@@ -73,7 +73,7 @@ static inline av_const int64_t MAC64(int64_t d, int a, int b)
 #define MAC64(d, a, b) ((d) = MAC64(d, a, b))
 #define MLS64(d, a, b) MAC64(d, -(a), b)
 
-#if defined(HAVE_ARMV5TE)
+#if HAVE_ARMV5TE
 
 /* signed 16x16 -> 32 multiply add accumulate */
 #   define MAC16(rt, ra, rb)                                            \
diff --git a/libavcodec/arm/mpegvideo_arm.c b/libavcodec/arm/mpegvideo_arm.c
index 18faed2d36..4882dd4426 100644
--- a/libavcodec/arm/mpegvideo_arm.c
+++ b/libavcodec/arm/mpegvideo_arm.c
@@ -31,10 +31,10 @@ void MPV_common_init_arm(MpegEncContext *s)
      * allow optimized functions for armv5te unless
      * a better iwmmxt function exists
      */
-#ifdef HAVE_ARMV5TE
+#if HAVE_ARMV5TE
     MPV_common_init_armv5te(s);
 #endif
-#ifdef HAVE_IWMMXT
+#if HAVE_IWMMXT
     MPV_common_init_iwmmxt(s);
 #endif
 }
diff --git a/libavcodec/asv1.c b/libavcodec/asv1.c
index 8f16111960..7e8699bcc7 100644
--- a/libavcodec/asv1.c
+++ b/libavcodec/asv1.c
@@ -465,7 +465,7 @@ for(i=0; i<s->avctx->extradata_size; i++){
     return (get_bits_count(&a->gb)+31)/32*4;
 }
 
-#if defined(CONFIG_ASV1_ENCODER) || defined(CONFIG_ASV2_ENCODER)
+#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
     ASV1Context * const a = avctx->priv_data;
     AVFrame *pict = data;
@@ -519,7 +519,7 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
 
     return size*4;
 }
-#endif /* defined(CONFIG_ASV1_ENCODER) || defined(CONFIG_ASV2_ENCODER) */
+#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
 
 static av_cold void common_init(AVCodecContext *avctx){
     ASV1Context * const a = avctx->priv_data;
@@ -569,7 +569,7 @@ static av_cold int decode_init(AVCodecContext *avctx){
     return 0;
 }
 
-#if defined(CONFIG_ASV1_ENCODER) || defined(CONFIG_ASV2_ENCODER)
+#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
 static av_cold int encode_init(AVCodecContext *avctx){
     ASV1Context * const a = avctx->priv_data;
     int i;
@@ -593,7 +593,7 @@ static av_cold int encode_init(AVCodecContext *avctx){
 
     return 0;
 }
-#endif /* defined(CONFIG_ASV1_ENCODER) || defined(CONFIG_ASV2_ENCODER) */
+#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
 
 static av_cold int decode_end(AVCodecContext *avctx){
     ASV1Context * const a = avctx->priv_data;
@@ -631,7 +631,7 @@ AVCodec asv2_decoder = {
     .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
 };
 
-#ifdef CONFIG_ASV1_ENCODER
+#if CONFIG_ASV1_ENCODER
 AVCodec asv1_encoder = {
     "asv1",
     CODEC_TYPE_VIDEO,
@@ -645,7 +645,7 @@ AVCodec asv1_encoder = {
 };
 #endif
 
-#ifdef CONFIG_ASV2_ENCODER
+#if CONFIG_ASV2_ENCODER
 AVCodec asv2_encoder = {
     "asv2",
     CODEC_TYPE_VIDEO,
diff --git a/libavcodec/bfin/mathops.h b/libavcodec/bfin/mathops.h
index 1dd9338f8b..8af789dd4b 100644
--- a/libavcodec/bfin/mathops.h
+++ b/libavcodec/bfin/mathops.h
@@ -22,7 +22,7 @@
 #ifndef AVCODEC_BFIN_MATHOPS_H
 #define AVCODEC_BFIN_MATHOPS_H
 
-#ifdef CONFIG_MPEGAUDIO_HP
+#if CONFIG_MPEGAUDIO_HP
 #define MULH(X,Y) ({ int xxo;                           \
     __asm__ (                                               \
         "a1 = %2.L * %1.L (FU);\n\t"                    \
diff --git a/libavcodec/bitstream.h b/libavcodec/bitstream.h
index 23bc34de90..0f8110612a 100644
--- a/libavcodec/bitstream.h
+++ b/libavcodec/bitstream.h
@@ -41,7 +41,7 @@
 //#define ALT_BITSTREAM_WRITER
 //#define ALIGNED_BITSTREAM_WRITER
 #if !defined(LIBMPEG2_BITSTREAM_READER) && !defined(A32_BITSTREAM_READER) && !defined(ALT_BITSTREAM_READER)
-#   ifdef ARCH_ARM
+#   if ARCH_ARM
 #       define A32_BITSTREAM_READER
 #   else
 #       define ALT_BITSTREAM_READER
@@ -52,7 +52,7 @@
 
 extern const uint8_t ff_reverse[256];
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 // avoid +32 for shift optimization (gcc should do that ...)
 static inline  int32_t NEG_SSR32( int32_t a, int8_t s){
     __asm__ ("sarl %1, %0\n\t"
@@ -196,7 +196,7 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
 #ifdef BITSTREAM_WRITER_LE
     bit_buf |= value << (32 - bit_left);
     if (n >= bit_left) {
-#ifndef HAVE_FAST_UNALIGNED
+#if !HAVE_FAST_UNALIGNED
         if (3 & (intptr_t) s->buf_ptr) {
             s->buf_ptr[0] = bit_buf      ;
             s->buf_ptr[1] = bit_buf >>  8;
@@ -217,7 +217,7 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
     } else {
         bit_buf<<=bit_left;
         bit_buf |= value >> (n - bit_left);
-#ifndef HAVE_FAST_UNALIGNED
+#if !HAVE_FAST_UNALIGNED
         if (3 & (intptr_t) s->buf_ptr) {
             s->buf_ptr[0] = bit_buf >> 24;
             s->buf_ptr[1] = bit_buf >> 16;
@@ -243,7 +243,7 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
 static inline void put_bits(PutBitContext *s, int n, unsigned int value)
 {
 #    ifdef ALIGNED_BITSTREAM_WRITER
-#        if defined(ARCH_X86)
+#        if ARCH_X86
     __asm__ volatile(
         "movl %0, %%ecx                 \n\t"
         "xorl %%eax, %%eax              \n\t"
@@ -274,7 +274,7 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
     s->index= index;
 #        endif
 #    else //ALIGNED_BITSTREAM_WRITER
-#        if defined(ARCH_X86)
+#        if ARCH_X86
     __asm__ volatile(
         "movl $7, %%ecx                 \n\t"
         "andl %0, %%ecx                 \n\t"
@@ -550,7 +550,7 @@ static inline void skip_bits_long(GetBitContext *s, int n){
         name##_bit_count-= 32;\
     }\
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 #   define SKIP_CACHE(name, gb, num)\
         __asm__(\
             "shldl %2, %1, %0          \n\t"\
diff --git a/libavcodec/cabac.h b/libavcodec/cabac.h
index e012727054..caed72277c 100644
--- a/libavcodec/cabac.h
+++ b/libavcodec/cabac.h
@@ -270,7 +270,7 @@ static void refill(CABACContext *c){
     c->bytestream+= CABAC_BITS/8;
 }
 
-#if ! ( defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) )
+#if ! ( ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS) )
 static void refill2(CABACContext *c){
     int i, x;
 
@@ -372,7 +372,7 @@ static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const st
     //FIXME gcc generates duplicate load/stores for c->low and c->range
 #define LOW          "0"
 #define RANGE        "4"
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 #define BYTESTART   "16"
 #define BYTE        "24"
 #define BYTEEND     "32"
@@ -381,7 +381,7 @@ static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const st
 #define BYTE        "16"
 #define BYTEEND     "20"
 #endif
-#if defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS)
+#if ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)
     int bit;
 
 #ifndef BRANCHLESS_CABAC_DECODER
@@ -467,7 +467,7 @@ static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const st
 #else /* BRANCHLESS_CABAC_DECODER */
 
 
-#if defined HAVE_FAST_CMOV
+#if HAVE_FAST_CMOV
 #define BRANCHLESS_GET_CABAC_UPDATE(ret, cabac, statep, low, lowword, range, tmp, tmpbyte)\
         "mov    "tmp"       , %%ecx                                     \n\t"\
         "shl    $17         , "tmp"                                     \n\t"\
@@ -537,7 +537,7 @@ static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const st
     );
     bit&=1;
 #endif /* BRANCHLESS_CABAC_DECODER */
-#else /* defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */
+#else /* ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS) */
     int s = *state;
     int RangeLPS= ff_h264_lps_range[2*(c->range&0xC0) + s];
     int bit, lps_mask av_unused;
@@ -576,7 +576,7 @@ static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const st
     if(!(c->low & CABAC_MASK))
         refill2(c);
 #endif /* BRANCHLESS_CABAC_DECODER */
-#endif /* defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */
+#endif /* ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS) */
     return bit;
 }
 
@@ -637,7 +637,7 @@ static int av_unused get_cabac_bypass(CABACContext *c){
 
 
 static av_always_inline int get_cabac_bypass_sign(CABACContext *c, int val){
-#if defined(ARCH_X86) && !(defined(PIC) && defined(__GNUC__))
+#if ARCH_X86 && !(defined(PIC) && defined(__GNUC__))
     __asm__ volatile(
         "movl "RANGE    "(%1), %%ebx            \n\t"
         "movl "LOW      "(%1), %%eax            \n\t"
diff --git a/libavcodec/cljr.c b/libavcodec/cljr.c
index c80af01f0d..bb8ae2c7b5 100644
--- a/libavcodec/cljr.c
+++ b/libavcodec/cljr.c
@@ -30,6 +30,7 @@
 
 /* Disable the encoder. */
 #undef CONFIG_CLJR_ENCODER
+#define CONFIG_CLJR_ENCODER 0
 
 typedef struct CLJRContext{
     AVCodecContext *avctx;
@@ -84,7 +85,7 @@ static int decode_frame(AVCodecContext *avctx,
     return buf_size;
 }
 
-#ifdef CONFIG_CLJR_ENCODER
+#if CONFIG_CLJR_ENCODER
 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
     CLJRContext * const a = avctx->priv_data;
     AVFrame *pict = data;
@@ -124,7 +125,7 @@ static av_cold int decode_init(AVCodecContext *avctx){
     return 0;
 }
 
-#ifdef CONFIG_CLJR_ENCODER
+#if CONFIG_CLJR_ENCODER
 static av_cold int encode_init(AVCodecContext *avctx){
 
     common_init(avctx);
@@ -146,7 +147,7 @@ AVCodec cljr_decoder = {
     .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
 };
 
-#ifdef CONFIG_CLJR_ENCODER
+#if CONFIG_CLJR_ENCODER
 AVCodec cljr_encoder = {
     "cljr",
     CODEC_TYPE_VIDEO,
diff --git a/libavcodec/cscd.c b/libavcodec/cscd.c
index ada6a712a3..55bf2ec128 100644
--- a/libavcodec/cscd.c
+++ b/libavcodec/cscd.c
@@ -23,7 +23,7 @@
 
 #include "avcodec.h"
 
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
 #include <zlib.h>
 #endif
 #include "libavutil/lzo.h"
@@ -163,7 +163,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
             break;
         }
         case 1: { // zlib compression
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
             unsigned long dlen = c->decomp_size;
             if (uncompress(c->decomp_buf, &dlen, &buf[2], buf_size - 2) != Z_OK)
                 av_log(avctx, AV_LOG_ERROR, "error during zlib decompression\n");
diff --git a/libavcodec/dct-test.c b/libavcodec/dct-test.c
index 04f75b05f6..e7c12dd732 100644
--- a/libavcodec/dct-test.c
+++ b/libavcodec/dct-test.c
@@ -97,14 +97,14 @@ struct algo algos[] = {
   {"INT",             1, j_rev_dct,          idct, MMX_PERM},
   {"SIMPLE-C",        1, ff_simple_idct,     idct, NO_PERM},
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
   {"MMX",             0, ff_fdct_mmx,        fdct, NO_PERM, FF_MM_MMX},
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
   {"MMX2",            0, ff_fdct_mmx2,       fdct, NO_PERM, FF_MM_MMXEXT},
   {"SSE2",            0, ff_fdct_sse2,       fdct, NO_PERM, FF_MM_SSE2},
 #endif
 
-#ifdef CONFIG_GPL
+#if CONFIG_GPL
   {"LIBMPEG2-MMX",    1, ff_mmx_idct,        idct, MMX_PERM, FF_MM_MMX},
   {"LIBMPEG2-MMXEXT", 1, ff_mmxext_idct,     idct, MMX_PERM, FF_MM_MMXEXT},
 #endif
@@ -114,25 +114,25 @@ struct algo algos[] = {
   {"XVID-SSE2",       1, ff_idct_xvid_sse2,  idct, SSE2_PERM, FF_MM_SSE2},
 #endif
 
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
   {"altivecfdct",     0, fdct_altivec,       fdct, NO_PERM, FF_MM_ALTIVEC},
 #endif
 
-#ifdef ARCH_BFIN
+#if ARCH_BFIN
   {"BFINfdct",        0, ff_bfin_fdct,       fdct, NO_PERM},
   {"BFINidct",        1, ff_bfin_idct,       idct, NO_PERM},
 #endif
 
-#ifdef ARCH_ARM
+#if ARCH_ARM
   {"SIMPLE-ARM",      1, simple_idct_ARM,    idct, NO_PERM },
   {"INT-ARM",         1, j_rev_dct_ARM,      idct, MMX_PERM },
-#ifdef HAVE_ARMV5TE
+#if HAVE_ARMV5TE
   {"SIMPLE-ARMV5TE",  1, simple_idct_armv5te, idct, NO_PERM },
 #endif
-#ifdef HAVE_ARMV6
+#if HAVE_ARMV6
   {"SIMPLE-ARMV6",    1, ff_simple_idct_armv6, idct, MMX_PERM },
 #endif
-#ifdef HAVE_NEON
+#if HAVE_NEON
   {"SIMPLE-NEON",     1, ff_simple_idct_neon, idct, PARTTRANS_PERM },
 #endif
 #endif /* ARCH_ARM */
@@ -186,7 +186,7 @@ static DCTELEM block_org[64] __attribute__ ((aligned (8)));
 
 static inline void mmx_emms(void)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     if (cpu_flags & FF_MM_MMX)
         __asm__ volatile ("emms\n\t");
 #endif
diff --git a/libavcodec/dnxhdenc.c b/libavcodec/dnxhdenc.c
index a79a161d0c..f206b72d60 100644
--- a/libavcodec/dnxhdenc.c
+++ b/libavcodec/dnxhdenc.c
@@ -177,7 +177,7 @@ static int dnxhd_encode_init(AVCodecContext *avctx)
 
     dsputil_init(&ctx->m.dsp, avctx);
     ff_dct_common_init(&ctx->m);
-#ifdef HAVE_MMX
+#if HAVE_MMX
     ff_dnxhd_init_mmx(ctx);
 #endif
     if (!ctx->m.dct_quantize)
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 76f5dbbf4d..c50764f285 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -169,7 +169,7 @@ void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_s
         int j;
         j = src_scantable[i];
         st->permutated[i] = permutation[j];
-#ifdef ARCH_PPC
+#if ARCH_PPC
         st->inverse[j] = i;
 #endif
     }
@@ -340,7 +340,7 @@ static int sse16_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
 }
 
 
-#ifdef CONFIG_SNOW_ENCODER //dwt is in snow.c
+#if CONFIG_SNOW_ENCODER //dwt is in snow.c
 static inline int w_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int w, int h, int type){
     int s, i, j;
     const int dec_count= w==8 ? 3 : 4;
@@ -2711,7 +2711,7 @@ static void wmv2_mspel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int
     }
 }
 
-#ifdef CONFIG_CAVS_DECODER
+#if CONFIG_CAVS_DECODER
 /* AVS specific */
 void ff_cavsdsp_init(DSPContext* c, AVCodecContext *avctx);
 
@@ -2729,7 +2729,7 @@ void ff_avg_cavs_qpel16_mc00_c(uint8_t *dst, uint8_t *src, int stride) {
 }
 #endif /* CONFIG_CAVS_DECODER */
 
-#if defined(CONFIG_VC1_DECODER) || defined(CONFIG_WMV3_DECODER)
+#if CONFIG_VC1_DECODER || CONFIG_WMV3_DECODER
 /* VC-1 specific */
 void ff_vc1dsp_init(DSPContext* c, AVCodecContext *avctx);
 
@@ -2743,11 +2743,11 @@ void ff_intrax8dsp_init(DSPContext* c, AVCodecContext *avctx);
 /* H264 specific */
 void ff_h264dspenc_init(DSPContext* c, AVCodecContext *avctx);
 
-#if defined(CONFIG_RV30_DECODER)
+#if CONFIG_RV30_DECODER
 void ff_rv30dsp_init(DSPContext* c, AVCodecContext *avctx);
 #endif /* CONFIG_RV30_DECODER */
 
-#if defined(CONFIG_RV40_DECODER)
+#if CONFIG_RV40_DECODER
 static void put_rv40_qpel16_mc33_c(uint8_t *dst, uint8_t *src, int stride){
     put_pixels16_xy2_c(dst, src, stride, 16);
 }
@@ -3467,7 +3467,7 @@ void ff_set_cmp(DSPContext* c, me_cmp_func *cmp, int type){
         case FF_CMP_NSSE:
             cmp[i]= c->nsse[i];
             break;
-#ifdef CONFIG_SNOW_ENCODER
+#if CONFIG_SNOW_ENCODER
         case FF_CMP_W53:
             cmp[i]= c->w53[i];
             break;
@@ -3518,7 +3518,7 @@ static void add_bytes_l2_c(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w){
 
 static void diff_bytes_c(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w){
     long i;
-#ifndef HAVE_FAST_UNALIGNED
+#if !HAVE_FAST_UNALIGNED
     if((long)src2 & (sizeof(long)-1)){
         for(i=0; i+7<w; i+=8){
             dst[i+0] = src1[i+0]-src2[i+0];
@@ -3686,7 +3686,7 @@ static int dct_sad8x8_c(/*MpegEncContext*/ void *c, uint8_t *src1, uint8_t *src2
     return s->dsp.sum_abs_dctelem(temp);
 }
 
-#ifdef CONFIG_GPL
+#if CONFIG_GPL
 #define DCT8_1D {\
     const int s07 = SRC(0) + SRC(7);\
     const int s16 = SRC(1) + SRC(6);\
@@ -3992,7 +3992,7 @@ static int ssd_int8_vs_int16_c(const int8_t *pix1, const int16_t *pix2,
 WRAPPER8_16_SQ(hadamard8_diff8x8_c, hadamard8_diff16_c)
 WRAPPER8_16_SQ(hadamard8_intra8x8_c, hadamard8_intra16_c)
 WRAPPER8_16_SQ(dct_sad8x8_c, dct_sad16_c)
-#ifdef CONFIG_GPL
+#if CONFIG_GPL
 WRAPPER8_16_SQ(dct264_sad8x8_c, dct264_sad16_c)
 #endif
 WRAPPER8_16_SQ(dct_max8x8_c, dct_max16_c)
@@ -4249,7 +4249,7 @@ int ff_check_alignment(void){
 
     if((long)&aligned & 15){
         if(!did_fail){
-#if defined(HAVE_MMX) || defined(HAVE_ALTIVEC)
+#if HAVE_MMX || HAVE_ALTIVEC
             av_log(NULL, AV_LOG_ERROR,
                 "Compiler did not align stack variables. Libavcodec has been miscompiled\n"
                 "and may be very slow or crash. This is not a bug in libavcodec,\n"
@@ -4269,7 +4269,7 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
 
     ff_check_alignment();
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
     if(avctx->dct_algo==FF_DCT_FASTINT) {
         c->fdct = fdct_ifast;
         c->fdct248 = fdct_ifast248;
@@ -4487,22 +4487,22 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
 
     c->draw_edges = draw_edges_c;
 
-#ifdef CONFIG_CAVS_DECODER
+#if CONFIG_CAVS_DECODER
     ff_cavsdsp_init(c,avctx);
 #endif
-#if defined(CONFIG_VC1_DECODER) || defined(CONFIG_WMV3_DECODER)
+#if CONFIG_VC1_DECODER || CONFIG_WMV3_DECODER
     ff_vc1dsp_init(c,avctx);
 #endif
-#if defined(CONFIG_WMV2_DECODER) || defined(CONFIG_VC1_DECODER) || defined(CONFIG_WMV3_DECODER)
+#if CONFIG_WMV2_DECODER || CONFIG_VC1_DECODER || CONFIG_WMV3_DECODER
     ff_intrax8dsp_init(c,avctx);
 #endif
-#if defined(CONFIG_H264_ENCODER)
+#if CONFIG_H264_ENCODER
     ff_h264dspenc_init(c,avctx);
 #endif
-#if defined(CONFIG_RV30_DECODER)
+#if CONFIG_RV30_DECODER
     ff_rv30dsp_init(c,avctx);
 #endif
-#if defined(CONFIG_RV40_DECODER)
+#if CONFIG_RV40_DECODER
     ff_rv40dsp_init(c,avctx);
     c->put_rv40_qpel_pixels_tab[0][15] = put_rv40_qpel16_mc33_c;
     c->avg_rv40_qpel_pixels_tab[0][15] = avg_rv40_qpel16_mc33_c;
@@ -4527,7 +4527,7 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
     c->hadamard8_diff[4]= hadamard8_intra16_c;
     SET_CMP_FUNC(dct_sad)
     SET_CMP_FUNC(dct_max)
-#ifdef CONFIG_GPL
+#if CONFIG_GPL
     SET_CMP_FUNC(dct264_sad)
 #endif
     c->sad[0]= pix_abs16_c;
@@ -4544,7 +4544,7 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
     c->vsse[4]= vsse_intra16_c;
     c->nsse[0]= nsse16_c;
     c->nsse[1]= nsse8_c;
-#ifdef CONFIG_SNOW_ENCODER
+#if CONFIG_SNOW_ENCODER
     c->w53[0]= w53_16_c;
     c->w53[1]= w53_8_c;
     c->w97[0]= w97_16_c;
@@ -4558,7 +4558,7 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
     c->diff_bytes= diff_bytes_c;
     c->sub_hfyu_median_prediction= sub_hfyu_median_prediction_c;
     c->bswap_buf= bswap_buf;
-#ifdef CONFIG_PNG_DECODER
+#if CONFIG_PNG_DECODER
     c->add_png_paeth_prediction= ff_add_png_paeth_prediction;
 #endif
 
@@ -4587,19 +4587,19 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
     c->try_8x8basis= try_8x8basis_c;
     c->add_8x8basis= add_8x8basis_c;
 
-#ifdef CONFIG_SNOW_DECODER
+#if CONFIG_SNOW_DECODER
     c->vertical_compose97i = ff_snow_vertical_compose97i;
     c->horizontal_compose97i = ff_snow_horizontal_compose97i;
     c->inner_add_yblock = ff_snow_inner_add_yblock;
 #endif
 
-#ifdef CONFIG_VORBIS_DECODER
+#if CONFIG_VORBIS_DECODER
     c->vorbis_inverse_coupling = vorbis_inverse_coupling;
 #endif
-#ifdef CONFIG_AC3_DECODER
+#if CONFIG_AC3_DECODER
     c->ac3_downmix = ff_ac3_downmix_c;
 #endif
-#ifdef CONFIG_FLAC_ENCODER
+#if CONFIG_FLAC_ENCODER
     c->flac_compute_autocorr = ff_flac_compute_autocorr;
 #endif
     c->vector_fmul = vector_fmul_c;
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 2cdeef5b7c..62415b7a0a 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -174,7 +174,7 @@ typedef struct ScanTable{
     const uint8_t *scantable;
     uint8_t permutated[64];
     uint8_t raster_end[64];
-#ifdef ARCH_PPC
+#if ARCH_PPC
                 /** Used by dct_quantize_altivec to find last-non-zero */
     DECLARE_ALIGNED(16, uint8_t, inverse[64]);
 #endif
@@ -584,7 +584,7 @@ void dsputil_init_vis(DSPContext* c, AVCodecContext *avctx);
 
 #define DECLARE_ALIGNED_16(t, v) DECLARE_ALIGNED(16, t, v)
 
-#if defined(HAVE_MMX)
+#if HAVE_MMX
 
 #undef emms_c
 
@@ -608,23 +608,23 @@ static inline void emms(void)
 
 void dsputil_init_pix_mmx(DSPContext* c, AVCodecContext *avctx);
 
-#elif defined(ARCH_ARM)
+#elif ARCH_ARM
 
 extern int mm_flags;
 
-#ifdef HAVE_NEON
+#if HAVE_NEON
 #   define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(16, t, v)
 #   define STRIDE_ALIGN 16
 #endif
 
-#elif defined(ARCH_PPC)
+#elif ARCH_PPC
 
 extern int mm_flags;
 
 #define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(16, t, v)
 #define STRIDE_ALIGN 16
 
-#elif defined(HAVE_MMI)
+#elif HAVE_MMI
 
 #define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(16, t, v)
 #define STRIDE_ALIGN 16
diff --git a/libavcodec/dv.c b/libavcodec/dv.c
index e3f54b8c1f..55987a9d69 100644
--- a/libavcodec/dv.c
+++ b/libavcodec/dv.c
@@ -1123,7 +1123,7 @@ static int dv_encode_video_segment(AVCodecContext *avctx, DVwork_chunk *work_chu
     return 0;
 }
 
-#ifdef CONFIG_DVVIDEO_DECODER
+#if CONFIG_DVVIDEO_DECODER
 /* NOTE: exactly one frame must be given (120000 bytes for NTSC,
    144000 bytes for PAL - or twice those for 50Mbps) */
 static int dvvideo_decode_frame(AVCodecContext *avctx,
@@ -1240,7 +1240,7 @@ static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c,
     return 5;
 }
 
-#ifdef CONFIG_DVVIDEO_ENCODER
+#if CONFIG_DVVIDEO_ENCODER
 static void dv_format_frame(DVVideoContext* c, uint8_t* buf)
 {
     int chan, i, j, k;
@@ -1328,7 +1328,7 @@ static int dvvideo_close(AVCodecContext *c)
 }
 
 
-#ifdef CONFIG_DVVIDEO_ENCODER
+#if CONFIG_DVVIDEO_ENCODER
 AVCodec dvvideo_encoder = {
     "dvvideo",
     CODEC_TYPE_VIDEO,
@@ -1341,7 +1341,7 @@ AVCodec dvvideo_encoder = {
 };
 #endif // CONFIG_DVVIDEO_ENCODER
 
-#ifdef CONFIG_DVVIDEO_DECODER
+#if CONFIG_DVVIDEO_DECODER
 AVCodec dvvideo_decoder = {
     "dvvideo",
     CODEC_TYPE_VIDEO,
diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index bdd3a663d5..5f8037f1ee 100644
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@@ -563,7 +563,7 @@ static int is_intra_more_likely(MpegEncContext *s){
 
     if(undamaged_count < 5) return 0; //almost all MBs damaged -> use temporal prediction
 
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
     //prevent dsp.sad() check, that requires access to the image
     if(s->avctx->xvmc_acceleration && s->pict_type==FF_I_TYPE) return 1;
 #endif
@@ -935,7 +935,7 @@ void ff_er_frame_end(MpegEncContext *s){
     }else
         guess_mv(s);
 
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
     /* the filters below are not XvMC compatible, skip them */
     if(s->avctx->xvmc_acceleration) goto ec_clean;
 #endif
@@ -1024,7 +1024,7 @@ void ff_er_frame_end(MpegEncContext *s){
         v_block_filter(s, s->current_picture.data[2], s->mb_width  , s->mb_height  , s->uvlinesize, 0);
     }
 
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
 ec_clean:
 #endif
     /* clean a few tables */
diff --git a/libavcodec/fft.c b/libavcodec/fft.c
index 7c8cce84c6..099ecbe282 100644
--- a/libavcodec/fft.c
+++ b/libavcodec/fft.c
@@ -91,7 +91,7 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
     s->imdct_half = ff_imdct_half_c;
     s->exptab1 = NULL;
 
-#if defined HAVE_MMX && defined HAVE_YASM
+#if HAVE_MMX && HAVE_YASM
     has_vectors = mm_support();
     if (has_vectors & FF_MM_SSE) {
         /* SSE for P3/P4/K8 */
@@ -110,7 +110,7 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
         s->imdct_half = ff_imdct_half_3dn;
         s->fft_calc = ff_fft_calc_3dn;
     }
-#elif defined HAVE_ALTIVEC && !defined ALTIVEC_USE_REFERENCE_C_CODE
+#elif HAVE_ALTIVEC && !defined ALTIVEC_USE_REFERENCE_C_CODE
     has_vectors = mm_support();
     if (has_vectors & FF_MM_ALTIVEC) {
         s->fft_calc = ff_fft_calc_altivec;
@@ -336,7 +336,7 @@ static void fft8(FFTComplex *z)
     TRANSFORM(z[1],z[3],z[5],z[7],sqrthalf,sqrthalf);
 }
 
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
 static void fft16(FFTComplex *z)
 {
     FFTSample t1, t2, t3, t4, t5, t6;
@@ -358,7 +358,7 @@ DECL_FFT(64,32,16)
 DECL_FFT(128,64,32)
 DECL_FFT(256,128,64)
 DECL_FFT(512,256,128)
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
 #define pass pass_big
 #endif
 DECL_FFT(1024,512,256)
diff --git a/libavcodec/ffv1.c b/libavcodec/ffv1.c
index 7211e16e9a..25007f51a5 100644
--- a/libavcodec/ffv1.c
+++ b/libavcodec/ffv1.c
@@ -350,7 +350,7 @@ static inline int get_vlc_symbol(GetBitContext *gb, VlcState * const state, int
     return ret;
 }
 
-#ifdef CONFIG_FFV1_ENCODER
+#if CONFIG_FFV1_ENCODER
 static inline int encode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){
     PlaneContext * const p= &s->plane[plane_index];
     RangeCoder * const c= &s->c;
@@ -543,7 +543,7 @@ static av_cold int common_init(AVCodecContext *avctx){
     return 0;
 }
 
-#ifdef CONFIG_FFV1_ENCODER
+#if CONFIG_FFV1_ENCODER
 static av_cold int encode_init(AVCodecContext *avctx)
 {
     FFV1Context *s = avctx->priv_data;
@@ -632,7 +632,7 @@ static void clear_state(FFV1Context *f){
     }
 }
 
-#ifdef CONFIG_FFV1_ENCODER
+#if CONFIG_FFV1_ENCODER
 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
     FFV1Context *f = avctx->priv_data;
     RangeCoder * const c= &f->c;
@@ -1025,7 +1025,7 @@ AVCodec ffv1_decoder = {
     .long_name= NULL_IF_CONFIG_SMALL("FFmpeg codec #1"),
 };
 
-#ifdef CONFIG_FFV1_ENCODER
+#if CONFIG_FFV1_ENCODER
 AVCodec ffv1_encoder = {
     "ffv1",
     CODEC_TYPE_VIDEO,
diff --git a/libavcodec/flacenc.c b/libavcodec/flacenc.c
index a13e379240..748906ea72 100644
--- a/libavcodec/flacenc.c
+++ b/libavcodec/flacenc.c
@@ -775,7 +775,7 @@ static void encode_residual_lpc(int32_t *res, const int32_t *smp, int n,
     for(i=0; i<order; i++) {
         res[i] = smp[i];
     }
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
     for(i=order; i<n; i+=2) {
         int j;
         int s = smp[i];
diff --git a/libavcodec/g726.c b/libavcodec/g726.c
index 90a20da2d9..1c5283668d 100644
--- a/libavcodec/g726.c
+++ b/libavcodec/g726.c
@@ -285,7 +285,7 @@ static av_cold int g726_reset(G726Context* c, int index)
     return 0;
 }
 
-#ifdef CONFIG_ADPCM_G726_ENCODER
+#if CONFIG_ADPCM_G726_ENCODER
 static int16_t g726_encode(G726Context* c, int16_t sig)
 {
     uint8_t i;
@@ -342,7 +342,7 @@ static av_cold int g726_close(AVCodecContext *avctx)
     return 0;
 }
 
-#ifdef CONFIG_ADPCM_G726_ENCODER
+#if CONFIG_ADPCM_G726_ENCODER
 static int g726_encode_frame(AVCodecContext *avctx,
                             uint8_t *dst, int buf_size, void *data)
 {
@@ -381,7 +381,7 @@ static int g726_decode_frame(AVCodecContext *avctx,
     return buf_size;
 }
 
-#ifdef CONFIG_ADPCM_G726_ENCODER
+#if CONFIG_ADPCM_G726_ENCODER
 AVCodec adpcm_g726_encoder = {
     "g726",
     CODEC_TYPE_AUDIO,
diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 781c0079ef..b3bbe5f9a4 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -54,7 +54,7 @@
 #define H263_MBTYPE_B_VLC_BITS 6
 #define CBPC_B_VLC_BITS 3
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 static void h263_encode_block(MpegEncContext * s, DCTELEM * block,
                               int n);
 static void h263p_encode_umotion(MpegEncContext * s, int val);
@@ -72,7 +72,7 @@ static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
 static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr);
 static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
                               int n, int coded, int intra, int rvlc);
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 static int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr);
 static void mpeg4_encode_visual_object_header(MpegEncContext * s);
 static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number);
@@ -80,7 +80,7 @@ static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_n
 static void mpeg4_decode_sprite_trajectory(MpegEncContext * s, GetBitContext *gb);
 static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding);
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 static uint8_t uni_DCtab_lum_len[512];
 static uint8_t uni_DCtab_chrom_len[512];
 static uint16_t uni_DCtab_lum_bits[512];
@@ -155,7 +155,7 @@ static void show_pict_info(MpegEncContext *s){
     );
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 
 static void aspect_to_info(MpegEncContext * s, AVRational aspect){
     int i;
@@ -736,7 +736,7 @@ void ff_h263_update_motion_val(MpegEncContext * s){
     }
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 
 static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){
     int l, bit_size, code;
@@ -1549,7 +1549,7 @@ void ff_h263_loop_filter(MpegEncContext * s){
     }
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 static int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr)
 {
     int x, y, wrap, a, c, pred_dc, scale;
@@ -1741,7 +1741,7 @@ int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
     return *mot_val;
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code)
 {
     int range, l, bit_size, sign, code, bits;
@@ -2652,7 +2652,7 @@ void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
 
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 
 /**
  * encodes the dc value.
@@ -3049,7 +3049,7 @@ static inline void memsetw(short *tab, int val, int n)
         tab[i] = val;
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 
 void ff_mpeg4_init_partitions(MpegEncContext *s)
 {
@@ -3106,7 +3106,7 @@ int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s){
     }
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 
 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
 {
@@ -4563,7 +4563,7 @@ static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
     } else if (s->mb_intra) {
         /* DC coef */
         if(s->codec_id == CODEC_ID_RV10){
-#ifdef CONFIG_RV10_DECODER
+#if CONFIG_RV10_DECODER
           if (s->rv10_version == 3 && s->pict_type == FF_I_TYPE) {
             int component, diff;
             component = (n <= 3 ? 0 : n - 4 + 1);
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index ae318b5576..dda05668aa 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -545,7 +545,7 @@ retry:
 }
 #endif
 
-#if defined(HAVE_MMX)
+#if HAVE_MMX
     if(s->codec_id == CODEC_ID_MPEG4 && s->xvid_build && avctx->idct_algo == FF_IDCT_AUTO && (mm_flags & FF_MM_MMX)){
         avctx->idct_algo= FF_IDCT_XVIDMMX;
         avctx->coded_width= 0; // force reinit
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 09e8938fbd..ad124cbbd5 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -36,7 +36,7 @@
 #include "vdpau_internal.h"
 
 #include "cabac.h"
-#ifdef ARCH_X86
+#if ARCH_X86
 #include "x86/h264_i386.h"
 #endif
 
@@ -1380,8 +1380,8 @@ static const uint8_t *decode_nal(H264Context *h, const uint8_t *src, int *dst_le
         printf("%2X ", src[i]);
 #endif
 
-#ifdef HAVE_FAST_UNALIGNED
-# ifdef HAVE_FAST_64BIT
+#if HAVE_FAST_UNALIGNED
+# if HAVE_FAST_64BIT
 #   define RS 7
     for(i=0; i+1<length; i+=9){
         if(!((~*(uint64_t*)(src+i) & (*(uint64_t*)(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
@@ -5224,7 +5224,7 @@ static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCT
     uint8_t *last_coeff_ctx_base;
     uint8_t *abs_level_m1_ctx_base;
 
-#ifndef ARCH_X86
+#if !ARCH_X86
 #define CABAC_ON_STACK
 #endif
 #ifdef CABAC_ON_STACK
@@ -5285,7 +5285,7 @@ static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCT
             index[coeff_count++] = last;\
         }
         const uint8_t *sig_off = significant_coeff_flag_offset_8x8[MB_FIELD];
-#if defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS)
+#if ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)
         coeff_count= decode_significance_8x8_x86(CC, significant_coeff_ctx_base, index, sig_off);
     } else {
         coeff_count= decode_significance_x86(CC, max_coeff, significant_coeff_ctx_base, index);
@@ -5360,7 +5360,7 @@ static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCT
 
 }
 
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
 static void decode_cabac_residual_dc( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
     decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, 1);
 }
@@ -5371,7 +5371,7 @@ static void decode_cabac_residual_nondc( H264Context *h, DCTELEM *block, int cat
 #endif
 
 static void decode_cabac_residual( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
     decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, cat == 0 || cat == 3);
 #else
     if( cat == 0 || cat == 3 ) decode_cabac_residual_dc(h, block, cat, n, scantable, qmul, max_coeff);
@@ -6572,7 +6572,7 @@ static void filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8
         filter_mb_mbaff_edgecv( h, &img_cr[0], uvlinesize, bS, rqp );
     }
 
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
     for( dir = 0; dir < 2; dir++ )
         filter_mb_dir(h, mb_x, mb_y, img_y, img_cb, img_cr, linesize, uvlinesize, mb_xy, mb_type, mvy_limit, dir ? 0 : first_vertical_edge_done, dir);
 #else
@@ -8023,7 +8023,7 @@ AVCodec h264_decoder = {
     .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
 };
 
-#ifdef CONFIG_H264_VDPAU_DECODER
+#if CONFIG_H264_VDPAU_DECODER
 AVCodec h264_vdpau_decoder = {
     "h264_vdpau",
     CODEC_TYPE_VIDEO,
@@ -8039,6 +8039,6 @@ AVCodec h264_vdpau_decoder = {
 };
 #endif
 
-#ifdef CONFIG_SVQ3_DECODER
+#if CONFIG_SVQ3_DECODER
 #include "svq3.c"
 #endif
diff --git a/libavcodec/h264_parser.c b/libavcodec/h264_parser.c
index cfa04c4460..515312c311 100644
--- a/libavcodec/h264_parser.c
+++ b/libavcodec/h264_parser.c
@@ -44,11 +44,11 @@ int ff_h264_find_frame_end(H264Context *h, const uint8_t *buf, int buf_size)
 
     for(i=0; i<buf_size; i++){
         if(state==7){
-#ifdef HAVE_FAST_UNALIGNED
+#if HAVE_FAST_UNALIGNED
         /* we check i<buf_size instead of i+3/7 because its simpler
          * and there should be FF_INPUT_BUFFER_PADDING_SIZE bytes at the end
          */
-#    ifdef HAVE_FAST_64BIT
+#    if HAVE_FAST_64BIT
             while(i<buf_size && !((~*(uint64_t*)(buf+i) & (*(uint64_t*)(buf+i) - 0x0101010101010101ULL)) & 0x8080808080808080ULL))
                 i+=8;
 #    else
diff --git a/libavcodec/huffyuv.c b/libavcodec/huffyuv.c
index bf13e4479c..c494f355bf 100644
--- a/libavcodec/huffyuv.c
+++ b/libavcodec/huffyuv.c
@@ -261,7 +261,7 @@ static int generate_bits_table(uint32_t *dst, uint8_t *len_table){
     return 0;
 }
 
-#if defined(CONFIG_HUFFYUV_ENCODER) || defined(CONFIG_FFVHUFF_ENCODER)
+#if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER
 typedef struct {
     uint64_t val;
     int name;
@@ -317,7 +317,7 @@ static void generate_len_table(uint8_t *dst, uint64_t *stats, int size){
         if(i==size) break;
     }
 }
-#endif /* defined(CONFIG_HUFFYUV_ENCODER) || defined(CONFIG_FFVHUFF_ENCODER) */
+#endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */
 
 static void generate_joint_tables(HYuvContext *s){
     uint16_t symbols[1<<VLC_BITS];
@@ -477,7 +477,7 @@ static int common_init(AVCodecContext *avctx){
     return 0;
 }
 
-#if defined(CONFIG_HUFFYUV_DECODER) || defined(CONFIG_FFVHUFF_DECODER)
+#if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER
 static av_cold int decode_init(AVCodecContext *avctx)
 {
     HYuvContext *s = avctx->priv_data;
@@ -573,9 +573,9 @@ s->bgr32=1;
 
     return 0;
 }
-#endif /* defined(CONFIG_HUFFYUV_DECODER) || defined(CONFIG_FFVHUFF_DECODER) */
+#endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */
 
-#if defined(CONFIG_HUFFYUV_ENCODER) || defined(CONFIG_FFVHUFF_ENCODER)
+#if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER
 static int store_table(HYuvContext *s, uint8_t *len, uint8_t *buf){
     int i;
     int index= 0;
@@ -725,7 +725,7 @@ static av_cold int encode_init(AVCodecContext *avctx)
 
     return 0;
 }
-#endif /* defined(CONFIG_HUFFYUV_ENCODER) || defined(CONFIG_FFVHUFF_ENCODER) */
+#endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */
 
 /* TODO instead of restarting the read when the code isn't in the first level
  * of the joint table, jump into the 2nd level of the individual table. */
@@ -761,7 +761,7 @@ static void decode_gray_bitstream(HYuvContext *s, int count){
     }
 }
 
-#if defined(CONFIG_HUFFYUV_ENCODER) || defined(CONFIG_FFVHUFF_ENCODER)
+#if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER
 static int encode_422_bitstream(HYuvContext *s, int count){
     int i;
 
@@ -854,7 +854,7 @@ static int encode_gray_bitstream(HYuvContext *s, int count){
     }
     return 0;
 }
-#endif /* defined(CONFIG_HUFFYUV_ENCODER) || defined(CONFIG_FFVHUFF_ENCODER) */
+#endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */
 
 static av_always_inline void decode_bgr_1(HYuvContext *s, int count, int decorrelate, int alpha){
     int i;
@@ -931,7 +931,7 @@ static int encode_bgr_bitstream(HYuvContext *s, int count){
     return 0;
 }
 
-#if defined(CONFIG_HUFFYUV_DECODER) || defined(CONFIG_FFVHUFF_DECODER)
+#if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER
 static void draw_slice(HYuvContext *s, int y){
     int h, cy;
     int offset[4];
@@ -1198,7 +1198,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const
 
     return (get_bits_count(&s->gb)+31)/32*4 + table_size;
 }
-#endif /* defined(CONFIG_HUFFYUV_DECODER) || defined(CONFIG_FFVHUFF_DECODER) */
+#endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */
 
 static int common_end(HYuvContext *s){
     int i;
@@ -1209,7 +1209,7 @@ static int common_end(HYuvContext *s){
     return 0;
 }
 
-#if defined(CONFIG_HUFFYUV_DECODER) || defined(CONFIG_FFVHUFF_DECODER)
+#if CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER
 static av_cold int decode_end(AVCodecContext *avctx)
 {
     HYuvContext *s = avctx->priv_data;
@@ -1224,9 +1224,9 @@ static av_cold int decode_end(AVCodecContext *avctx)
 
     return 0;
 }
-#endif /* defined(CONFIG_HUFFYUV_DECODER) || defined(CONFIG_FFVHUFF_DECODER) */
+#endif /* CONFIG_HUFFYUV_DECODER || CONFIG_FFVHUFF_DECODER */
 
-#if defined(CONFIG_HUFFYUV_ENCODER) || defined(CONFIG_FFVHUFF_ENCODER)
+#if CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER
 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
     HYuvContext *s = avctx->priv_data;
     AVFrame *pict = data;
@@ -1431,9 +1431,9 @@ static av_cold int encode_end(AVCodecContext *avctx)
 
     return 0;
 }
-#endif /* defined(CONFIG_HUFFYUV_ENCODER) || defined(CONFIG_FFVHUFF_ENCODER) */
+#endif /* CONFIG_HUFFYUV_ENCODER || CONFIG_FFVHUFF_ENCODER */
 
-#ifdef CONFIG_HUFFYUV_DECODER
+#if CONFIG_HUFFYUV_DECODER
 AVCodec huffyuv_decoder = {
     "huffyuv",
     CODEC_TYPE_VIDEO,
@@ -1449,7 +1449,7 @@ AVCodec huffyuv_decoder = {
 };
 #endif
 
-#ifdef CONFIG_FFVHUFF_DECODER
+#if CONFIG_FFVHUFF_DECODER
 AVCodec ffvhuff_decoder = {
     "ffvhuff",
     CODEC_TYPE_VIDEO,
@@ -1465,7 +1465,7 @@ AVCodec ffvhuff_decoder = {
 };
 #endif
 
-#ifdef CONFIG_HUFFYUV_ENCODER
+#if CONFIG_HUFFYUV_ENCODER
 AVCodec huffyuv_encoder = {
     "huffyuv",
     CODEC_TYPE_VIDEO,
@@ -1479,7 +1479,7 @@ AVCodec huffyuv_encoder = {
 };
 #endif
 
-#ifdef CONFIG_FFVHUFF_ENCODER
+#if CONFIG_FFVHUFF_ENCODER
 AVCodec ffvhuff_encoder = {
     "ffvhuff",
     CODEC_TYPE_VIDEO,
diff --git a/libavcodec/imgconvert.c b/libavcodec/imgconvert.c
index 952ddcb566..94ea967d1d 100644
--- a/libavcodec/imgconvert.c
+++ b/libavcodec/imgconvert.c
@@ -34,7 +34,7 @@
 #include "dsputil.h"
 #include "colorspace.h"
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
 #include "x86/mmx.h"
 #include "x86/dsputil_mmx.h"
 #endif
@@ -2089,7 +2089,7 @@ int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
     return 0;
 }
 
-#ifndef CONFIG_SWSCALE
+#if !CONFIG_SWSCALE
 static uint8_t y_ccir_to_jpeg[256];
 static uint8_t y_jpeg_to_ccir[256];
 static uint8_t c_ccir_to_jpeg[256];
@@ -2662,7 +2662,7 @@ int img_get_alpha_info(const AVPicture *src,
     return ret;
 }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
 #define DEINT_INPLACE_LINE_LUM \
                     movd_m2r(lum_m4[0],mm0);\
                     movd_m2r(lum_m3[0],mm1);\
@@ -2716,7 +2716,7 @@ static void deinterlace_line(uint8_t *dst,
                              const uint8_t *lum,
                              int size)
 {
-#ifndef HAVE_MMX
+#if !HAVE_MMX
     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     int sum;
 
@@ -2754,7 +2754,7 @@ static void deinterlace_line(uint8_t *dst,
 static void deinterlace_line_inplace(uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,
                              int size)
 {
-#ifndef HAVE_MMX
+#if !HAVE_MMX
     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     int sum;
 
diff --git a/libavcodec/imgresample.c b/libavcodec/imgresample.c
index 6ca810c6b4..6e897258d0 100644
--- a/libavcodec/imgresample.c
+++ b/libavcodec/imgresample.c
@@ -29,7 +29,7 @@
 #include "imgconvert.h"
 #include "libswscale/swscale.h"
 
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
 #include "ppc/imgresample_altivec.h"
 #endif
 
@@ -153,7 +153,7 @@ static void v_resample(uint8_t *dst, int dst_width, const uint8_t *src,
     }
 }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
 
 #include "x86/mmx.h"
 
@@ -340,7 +340,7 @@ static void h_resample(uint8_t *dst, int dst_width, const uint8_t *src,
     } else {
         n = dst_width;
     }
-#ifdef HAVE_MMX
+#if HAVE_MMX
     if ((mm_flags & FF_MM_MMX) && NB_TAPS == 4)
         h_resample_fast4_mmx(dst, n,
                              src, src_width, src_start, src_incr, filters);
@@ -397,7 +397,7 @@ static void component_resample(ImgReSampleContext *s,
         }
         /* apply vertical filter */
         phase_y = get_phase(src_y);
-#ifdef HAVE_MMX
+#if HAVE_MMX
         /* desactivated MMX because loss of precision */
         if ((mm_flags & FF_MM_MMX) && NB_TAPS == 4 && 0)
             v_resample4_mmx(output, owidth,
@@ -405,7 +405,7 @@ static void component_resample(ImgReSampleContext *s,
                             &s->v_filters[phase_y][0]);
         else
 #endif
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
         if ((mm_flags & FF_MM_ALTIVEC) && NB_TAPS == 4 && FILTER_BITS <= 6)
             v_resample16_altivec(output, owidth,
                                  s->line_buf + (ring_y - NB_TAPS + 1) * owidth,
@@ -732,7 +732,7 @@ static void dump_filter(int16_t *filter)
     }
 }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
 int mm_flags;
 #endif
 
@@ -804,7 +804,7 @@ int main(int argc, char **argv)
     }
 
     /* mmx test */
-#ifdef HAVE_MMX
+#if HAVE_MMX
     av_log(NULL, AV_LOG_INFO, "MMX test\n");
     fact = 0.72;
     xsize = (int)(XSIZE * fact);
diff --git a/libavcodec/lcldec.c b/libavcodec/lcldec.c
index 5560b9a646..2f16b730ab 100644
--- a/libavcodec/lcldec.c
+++ b/libavcodec/lcldec.c
@@ -45,7 +45,7 @@
 #include "bitstream.h"
 #include "lcl.h"
 
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
 #include <zlib.h>
 #endif
 
@@ -65,7 +65,7 @@ typedef struct LclDecContext {
     unsigned int decomp_size;
     // Decompression buffer
     unsigned char* decomp_buf;
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     z_stream zstream;
 #endif
 } LclDecContext;
@@ -174,7 +174,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const
     unsigned char yq, y1q, uq, vq;
     int uqvq;
     unsigned int mthread_inlen, mthread_outlen;
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     int zret; // Zlib return code
 #endif
     unsigned int len = buf_size;
@@ -235,7 +235,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const
         }
         break;
     case CODEC_ID_ZLIB:
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
         /* Using the original dll with normal compression (-1) and RGB format
          * gives a file with ZLIB fourcc, but frame is really uncompressed.
          * To be sure that's true check also frame size */
@@ -524,7 +524,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     c->pic.data[0] = NULL;
 
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     // Needed if zlib unused or init aborted before inflateInit
     memset(&(c->zstream), 0, sizeof(z_stream));
 #endif
@@ -599,7 +599,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
         }
         break;
     case CODEC_ID_ZLIB:
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
         switch (c->compression) {
         case COMP_ZLIB_HISPEED:
             av_log(avctx, AV_LOG_INFO, "High speed compression.\n");
@@ -648,7 +648,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     /* If needed init zlib */
     if (avctx->codec_id == CODEC_ID_ZLIB) {
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
         c->zstream.zalloc = Z_NULL;
         c->zstream.zfree = Z_NULL;
         c->zstream.opaque = Z_NULL;
@@ -679,14 +679,14 @@ static av_cold int decode_end(AVCodecContext *avctx)
 
     if (c->pic.data[0])
         avctx->release_buffer(avctx, &c->pic);
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     inflateEnd(&(c->zstream));
 #endif
 
     return 0;
 }
 
-#ifdef CONFIG_MSZH_DECODER
+#if CONFIG_MSZH_DECODER
 AVCodec mszh_decoder = {
     "mszh",
     CODEC_TYPE_VIDEO,
@@ -701,7 +701,7 @@ AVCodec mszh_decoder = {
 };
 #endif
 
-#ifdef CONFIG_ZLIB_DECODER
+#if CONFIG_ZLIB_DECODER
 AVCodec zlib_decoder = {
     "zlib",
     CODEC_TYPE_VIDEO,
diff --git a/libavcodec/lclenc.c b/libavcodec/lclenc.c
index d0269655e5..680a511be1 100644
--- a/libavcodec/lclenc.c
+++ b/libavcodec/lclenc.c
@@ -45,7 +45,7 @@
 #include "bitstream.h"
 #include "lcl.h"
 
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
 #include <zlib.h>
 #endif
 
@@ -70,7 +70,7 @@ typedef struct LclEncContext {
     unsigned int max_comp_size;
     // Compression buffer
     unsigned char* comp_buf;
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     z_stream zstream;
 #endif
 } LclEncContext;
@@ -87,7 +87,7 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
     int i;
     int zret; // Zlib return code
 
-#ifndef CONFIG_ZLIB
+#if !CONFIG_ZLIB
     av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled in.\n");
     return -1;
 #else
@@ -144,7 +144,7 @@ static av_cold int encode_init(AVCodecContext *avctx)
     LclEncContext *c = avctx->priv_data;
     int zret; // Zlib return code
 
-#ifndef CONFIG_ZLIB
+#if !CONFIG_ZLIB
     av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
     return 1;
 #else
@@ -213,7 +213,7 @@ static av_cold int encode_end(AVCodecContext *avctx)
 
     av_freep(&avctx->extradata);
     av_freep(&c->comp_buf);
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     deflateEnd(&(c->zstream));
 #endif
 
diff --git a/libavcodec/libamr.c b/libavcodec/libamr.c
index 79ca57ff37..80cb09019b 100644
--- a/libavcodec/libamr.c
+++ b/libavcodec/libamr.c
@@ -65,7 +65,7 @@
 
 #include "avcodec.h"
 
-#ifdef CONFIG_LIBAMR_NB_FIXED
+#if CONFIG_LIBAMR_NB_FIXED
 
 #define MMS_IO
 
@@ -137,7 +137,7 @@ static void amr_decode_fix_avctx(AVCodecContext * avctx)
     avctx->sample_fmt = SAMPLE_FMT_S16;
 }
 
-#ifdef CONFIG_LIBAMR_NB_FIXED
+#if CONFIG_LIBAMR_NB_FIXED
 /* fixed point version*/
 /* frame size in serial bitstream file (frame type + serial stream + flags) */
 #define SERIAL_FRAMESIZE (1+MAX_SERIAL_SIZE+5)
@@ -353,7 +353,7 @@ static int amr_nb_encode_frame(AVCodecContext *avctx,
 }
 
 
-#elif defined(CONFIG_LIBAMR_NB) /* Float point version*/
+#elif CONFIG_LIBAMR_NB /* Float point version*/
 
 typedef struct AMRContext {
     int frameCount;
@@ -492,7 +492,7 @@ static int amr_nb_encode_frame(AVCodecContext *avctx,
 
 #endif
 
-#if defined(CONFIG_LIBAMR_NB) || defined(CONFIG_LIBAMR_NB_FIXED)
+#if CONFIG_LIBAMR_NB || CONFIG_LIBAMR_NB_FIXED
 
 AVCodec libamr_nb_decoder =
 {
@@ -524,7 +524,7 @@ AVCodec libamr_nb_encoder =
 #endif
 
 /* -----------AMR wideband ------------*/
-#ifdef CONFIG_LIBAMR_WB
+#if CONFIG_LIBAMR_WB
 
 #ifdef _TYPEDEF_H
 //To avoid duplicate typedefs from typedef in amr-nb
diff --git a/libavcodec/libdirac.h b/libavcodec/libdirac.h
index 54db287824..b677a7e5e1 100644
--- a/libavcodec/libdirac.h
+++ b/libavcodec/libdirac.h
@@ -28,7 +28,7 @@
 
 #include "config.h"
 
-#ifdef CONFIG_LIBDIRAC
+#if CONFIG_LIBDIRAC
 
 #include "avcodec.h"
 #include <libdirac_common/dirac_types.h>
diff --git a/libavcodec/libfaad.c b/libavcodec/libfaad.c
index c6da20dc3d..7cf39e2a5f 100644
--- a/libavcodec/libfaad.c
+++ b/libavcodec/libfaad.c
@@ -35,12 +35,13 @@
 #endif
 
 /*
- * when CONFIG_LIBFAADBIN is defined the libfaad will be opened at runtime
+ * when CONFIG_LIBFAADBIN is true libfaad will be opened at runtime
  */
 //#undef CONFIG_LIBFAADBIN
-//#define CONFIG_LIBFAADBIN
+//#define CONFIG_LIBFAADBIN 0
+//#define CONFIG_LIBFAADBIN 1
 
-#ifdef CONFIG_LIBFAADBIN
+#if CONFIG_LIBFAADBIN
 #include <dlfcn.h>
 static const char* const libfaadname = "libfaad.so";
 #else
@@ -224,7 +225,7 @@ static av_cold int faac_decode_init(AVCodecContext *avctx)
     FAACContext *s = avctx->priv_data;
     faacDecConfigurationPtr faac_cfg;
 
-#ifdef CONFIG_LIBFAADBIN
+#if CONFIG_LIBFAADBIN
     const char* err = 0;
 
     s->handle = dlopen(libfaadname, RTLD_LAZY);
@@ -259,7 +260,7 @@ static av_cold int faac_decode_init(AVCodecContext *avctx)
 
 #undef dfaac
 
-#ifdef CONFIG_LIBFAADBIN
+#if CONFIG_LIBFAADBIN
     if (err) {
         dlclose(s->handle);
         av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot resolve %s in %s!\n",
diff --git a/libavcodec/libschroedinger.h b/libavcodec/libschroedinger.h
index 6902a5d059..79faefcb61 100644
--- a/libavcodec/libschroedinger.h
+++ b/libavcodec/libschroedinger.h
@@ -28,7 +28,7 @@
 
 #include "config.h"
 
-#ifdef CONFIG_LIBSCHROEDINGER
+#if CONFIG_LIBSCHROEDINGER
 
 #include <schroedinger/schrobitstream.h>
 #include <schroedinger/schroframe.h>
diff --git a/libavcodec/libxvidff.c b/libavcodec/libxvidff.c
index 314945961b..ac1553f2a8 100644
--- a/libavcodec/libxvidff.c
+++ b/libavcodec/libxvidff.c
@@ -166,9 +166,9 @@ av_cold int ff_xvid_encode_init(AVCodecContext *avctx)  {
     xvid_gbl_init.version = XVID_VERSION;
     xvid_gbl_init.debug = 0;
 
-#ifdef ARCH_PPC
+#if ARCH_PPC
     /* Xvid's PPC support is borked, use libavcodec to detect */
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
     if( has_altivec() ) {
         xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
     } else
diff --git a/libavcodec/mathops.h b/libavcodec/mathops.h
index 07265c81f5..9ef62cfb31 100644
--- a/libavcodec/mathops.h
+++ b/libavcodec/mathops.h
@@ -24,19 +24,19 @@
 
 #include "libavutil/common.h"
 
-#ifdef ARCH_X86_32
+#if   ARCH_X86_32
 
 #include "x86/mathops.h"
 
-#elif defined(ARCH_ARM)
+#elif ARCH_ARM
 
 #include "arm/mathops.h"
 
-#elif defined(ARCH_PPC)
+#elif ARCH_PPC
 
 #include "ppc/mathops.h"
 
-#elif defined(ARCH_BFIN)
+#elif ARCH_BFIN
 
 #include "bfin/mathops.h"
 
diff --git a/libavcodec/mpc.c b/libavcodec/mpc.c
index 35ccbf6ba9..3a5b83bb3b 100644
--- a/libavcodec/mpc.c
+++ b/libavcodec/mpc.c
@@ -30,7 +30,7 @@
 #include "bitstream.h"
 #include "dsputil.h"
 
-#ifdef CONFIG_MPEGAUDIO_HP
+#if CONFIG_MPEGAUDIO_HP
 #define USE_HIGHPRECISION
 #endif
 #include "mpegaudio.h"
diff --git a/libavcodec/mpc.h b/libavcodec/mpc.h
index 038c34f20a..d9aa22af41 100644
--- a/libavcodec/mpc.h
+++ b/libavcodec/mpc.h
@@ -33,7 +33,7 @@
 #include "bitstream.h"
 #include "dsputil.h"
 
-#ifdef CONFIG_MPEGAUDIO_HP
+#if CONFIG_MPEGAUDIO_HP
 #define USE_HIGHPRECISION
 #endif
 #include "mpegaudio.h"
diff --git a/libavcodec/mpc7.c b/libavcodec/mpc7.c
index 2db417280c..168e60b995 100644
--- a/libavcodec/mpc7.c
+++ b/libavcodec/mpc7.c
@@ -30,7 +30,7 @@
 #include "bitstream.h"
 #include "dsputil.h"
 
-#ifdef CONFIG_MPEGAUDIO_HP
+#if CONFIG_MPEGAUDIO_HP
 #define USE_HIGHPRECISION
 #endif
 #include "mpegaudio.h"
diff --git a/libavcodec/mpc8.c b/libavcodec/mpc8.c
index c47e74dde2..9e21f09139 100644
--- a/libavcodec/mpc8.c
+++ b/libavcodec/mpc8.c
@@ -30,7 +30,7 @@
 #include "bitstream.h"
 #include "dsputil.h"
 
-#ifdef CONFIG_MPEGAUDIO_HP
+#if CONFIG_MPEGAUDIO_HP
 #define USE_HIGHPRECISION
 #endif
 #include "mpegaudio.h"
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 0e41ffe9c5..8971e2bbb2 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -303,7 +303,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
         }else
             memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
         s->mb_intra = 1;
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
         //if 1, we memcpy blocks in xvmcvideo
         if(s->avctx->xvmc_acceleration > 1){
             XVMC_pack_pblocks(s,-1);//inter are always full blocks
@@ -516,7 +516,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
                 return -1;
             }
 
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
             //if 1, we memcpy blocks in xvmcvideo
             if(s->avctx->xvmc_acceleration > 1){
                 XVMC_pack_pblocks(s,cbp);
@@ -1644,7 +1644,7 @@ static int mpeg_field_start(MpegEncContext *s){
                 }
             }
     }
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
 // MPV_frame_start will call this function too,
 // but we need to call it on every field
     if(s->avctx->xvmc_acceleration)
@@ -1735,7 +1735,7 @@ static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
     }
 
     for(;;) {
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
         //If 1, we memcpy blocks in xvmcvideo.
         if(s->avctx->xvmc_acceleration > 1)
             XVMC_init_block(s);//set s->block
@@ -1917,7 +1917,7 @@ static int slice_end(AVCodecContext *avctx, AVFrame *pict)
     if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
         return 0;
 
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
     if(s->avctx->xvmc_acceleration)
         XVMC_field_end(s);
 #endif
@@ -2473,7 +2473,7 @@ AVCodec mpegvideo_decoder = {
     .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
 };
 
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
 static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx){
     Mpeg1Context *s;
 
diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index a1386a08d2..efab550e4f 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -36,7 +36,7 @@
 
 /* define USE_HIGHPRECISION to have a bit exact (but slower) mpeg
    audio decoder */
-#ifdef CONFIG_MPEGAUDIO_HP
+#if CONFIG_MPEGAUDIO_HP
 #   define USE_HIGHPRECISION
 #endif
 
@@ -2322,7 +2322,7 @@ static void flush(AVCodecContext *avctx){
     s->last_buf_size= 0;
 }
 
-#ifdef CONFIG_MP3ADU_DECODER
+#if CONFIG_MP3ADU_DECODER
 static int decode_frame_adu(AVCodecContext * avctx,
                         void *data, int *data_size,
                         const uint8_t * buf, int buf_size)
@@ -2372,7 +2372,7 @@ static int decode_frame_adu(AVCodecContext * avctx,
 }
 #endif /* CONFIG_MP3ADU_DECODER */
 
-#ifdef CONFIG_MP3ON4_DECODER
+#if CONFIG_MP3ON4_DECODER
 
 /**
  * Context for MP3On4 decoder
@@ -2534,7 +2534,7 @@ static int decode_frame_mp3on4(AVCodecContext * avctx,
 }
 #endif /* CONFIG_MP3ON4_DECODER */
 
-#ifdef CONFIG_MP1_DECODER
+#if CONFIG_MP1_DECODER
 AVCodec mp1_decoder =
 {
     "mp1",
@@ -2550,7 +2550,7 @@ AVCodec mp1_decoder =
     .long_name= NULL_IF_CONFIG_SMALL("MP1 (MPEG audio layer 1)"),
 };
 #endif
-#ifdef CONFIG_MP2_DECODER
+#if CONFIG_MP2_DECODER
 AVCodec mp2_decoder =
 {
     "mp2",
@@ -2566,7 +2566,7 @@ AVCodec mp2_decoder =
     .long_name= NULL_IF_CONFIG_SMALL("MP2 (MPEG audio layer 2)"),
 };
 #endif
-#ifdef CONFIG_MP3_DECODER
+#if CONFIG_MP3_DECODER
 AVCodec mp3_decoder =
 {
     "mp3",
@@ -2582,7 +2582,7 @@ AVCodec mp3_decoder =
     .long_name= NULL_IF_CONFIG_SMALL("MP3 (MPEG audio layer 3)"),
 };
 #endif
-#ifdef CONFIG_MP3ADU_DECODER
+#if CONFIG_MP3ADU_DECODER
 AVCodec mp3adu_decoder =
 {
     "mp3adu",
@@ -2598,7 +2598,7 @@ AVCodec mp3adu_decoder =
     .long_name= NULL_IF_CONFIG_SMALL("ADU (Application Data Unit) MP3 (MPEG audio layer 3)"),
 };
 #endif
-#ifdef CONFIG_MP3ON4_DECODER
+#if CONFIG_MP3ON4_DECODER
 AVCodec mp3on4_decoder =
 {
     "mp3on4",
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 43a6e85a11..bc0b50f0df 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -121,19 +121,19 @@ int ff_dct_common_init(MpegEncContext *s)
         s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_bitexact;
     s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_c;
 
-#if defined(HAVE_MMX)
+#if   HAVE_MMX
     MPV_common_init_mmx(s);
-#elif defined(ARCH_ALPHA)
+#elif ARCH_ALPHA
     MPV_common_init_axp(s);
-#elif defined(CONFIG_MLIB)
+#elif CONFIG_MLIB
     MPV_common_init_mlib(s);
-#elif defined(HAVE_MMI)
+#elif HAVE_MMI
     MPV_common_init_mmi(s);
-#elif defined(ARCH_ARM)
+#elif ARCH_ARM
     MPV_common_init_arm(s);
-#elif defined(HAVE_ALTIVEC)
+#elif HAVE_ALTIVEC
     MPV_common_init_altivec(s);
-#elif defined(ARCH_BFIN)
+#elif ARCH_BFIN
     MPV_common_init_bfin(s);
 #endif
 
@@ -939,7 +939,7 @@ alloc:
         update_noise_reduction(s);
     }
 
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
     if(s->avctx->xvmc_acceleration)
         return XVMC_field_start(s, avctx);
 #endif
@@ -951,7 +951,7 @@ void MPV_frame_end(MpegEncContext *s)
 {
     int i;
     /* draw edge for correct motion prediction if outside */
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
 //just to make sure that all data is rendered.
     if(s->avctx->xvmc_acceleration){
         XVMC_field_end(s);
@@ -1736,7 +1736,7 @@ void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM block[12][64],
 {
     int mb_x, mb_y;
     const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
-#ifdef CONFIG_XVMC
+#if CONFIG_XVMC
     if(s->avctx->xvmc_acceleration){
         XVMC_decode_mb(s);//xvmc uses pblocks
         return;
@@ -1974,7 +1974,7 @@ skip_idct:
 }
 
 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]){
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
     if(s->out_format == FMT_MPEG1) {
         if(s->avctx->lowres) MPV_decode_mb_internal(s, block, 1, 1);
         else                 MPV_decode_mb_internal(s, block, 0, 1);
diff --git a/libavcodec/mpegvideo_common.h b/libavcodec/mpegvideo_common.h
index 6875e85313..acff26f185 100644
--- a/libavcodec/mpegvideo_common.h
+++ b/libavcodec/mpegvideo_common.h
@@ -371,7 +371,7 @@ void mpeg_motion(MpegEncContext *s,
                  uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
                  int motion_x, int motion_y, int h)
 {
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
     if(s->out_format == FMT_MPEG1)
         mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, field_based,
                     bottom_field, field_select, ref_picture, pix_op,
@@ -888,7 +888,7 @@ static inline void MPV_motion(MpegEncContext *s,
                               op_pixels_func (*pix_op)[4],
                               qpel_mc_func (*qpix_op)[16])
 {
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
     if(s->out_format == FMT_MPEG1)
         MPV_motion_internal(s, dest_y, dest_cb, dest_cr, dir,
                             ref_picture, pix_op, qpix_op, 1);
diff --git a/libavcodec/msmpeg4.c b/libavcodec/msmpeg4.c
index 58d1a9773a..ddc8e6e997 100644
--- a/libavcodec/msmpeg4.c
+++ b/libavcodec/msmpeg4.c
@@ -62,7 +62,7 @@ static uint32_t v2_dc_chroma_table[512][2];
 static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr);
 static void init_h263_dc_for_msmpeg4(void);
 static inline void msmpeg4_memsetw(short *tab, int val, int n);
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 static void msmpeg4v2_encode_motion(MpegEncContext * s, int val);
 static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra);
 #endif //CONFIG_ENCODERS
@@ -79,7 +79,7 @@ int frame_count = 0;
 
 #include "msmpeg4data.h"
 
-#ifdef CONFIG_ENCODERS //strangely gcc includes this even if it is not references
+#if CONFIG_ENCODERS //strangely gcc includes this even if it is not referenced
 static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2];
 #endif //CONFIG_ENCODERS
 
@@ -109,7 +109,7 @@ static void common_init(MpegEncContext * s)
         s->y_dc_scale_table= wmv1_y_dc_scale_table;
         s->c_dc_scale_table= wmv1_c_dc_scale_table;
         break;
-#if defined(CONFIG_WMV3_DECODER)||defined(CONFIG_VC1_DECODER)
+#if CONFIG_WMV3_DECODER || CONFIG_VC1_DECODER
     case 6:
         s->y_dc_scale_table= wmv3_dc_scale_table;
         s->c_dc_scale_table= wmv3_dc_scale_table;
@@ -134,7 +134,7 @@ static void common_init(MpegEncContext * s)
     }
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 
 /* build the table which associate a (x,y) motion vector to a vlc */
 static void init_mv_table(MVTable *tab)
@@ -411,7 +411,7 @@ int ff_msmpeg4_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block
     return pred;
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 
 void ff_msmpeg4_encode_motion(MpegEncContext * s,
                                   int mx, int my)
@@ -653,7 +653,7 @@ static inline int msmpeg4_pred_dc(MpegEncContext * s, int n,
        necessitate to modify mpegvideo.c. The problem comes from the
        fact they decided to store the quantized DC (which would lead
        to problems if Q could vary !) */
-#if (defined(ARCH_X86)) && !defined PIC
+#if ARCH_X86 && !defined PIC
     __asm__ volatile(
         "movl %3, %%eax         \n\t"
         "shrl $1, %%eax         \n\t"
@@ -673,7 +673,7 @@ static inline int msmpeg4_pred_dc(MpegEncContext * s, int n,
         : "%eax", "%edx"
     );
 #else
-    /* #elif defined (ARCH_ALPHA) */
+    /* #elif ARCH_ALPHA */
     /* Divisions are extremely costly on Alpha; optimize the most
        common case. But they are costly everywhere...
      */
@@ -1362,7 +1362,7 @@ static inline void msmpeg4_memsetw(short *tab, int val, int n)
         tab[i] = val;
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 static void msmpeg4v2_encode_motion(MpegEncContext * s, int val)
 {
     int range, bit_size, sign, code, bits;
diff --git a/libavcodec/options.c b/libavcodec/options.c
index c875b31a15..e04219a1d7 100644
--- a/libavcodec/options.c
+++ b/libavcodec/options.c
@@ -267,7 +267,7 @@ static const AVOption options[]={
 {"vsad", "sum of absolute vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 {"vsse","sum of squared vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
 {"nsse", "noise preserving sum of squared differences", 0, FF_OPT_TYPE_CONST, FF_CMP_NSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
-#ifdef CONFIG_SNOW_ENCODER
+#if CONFIG_SNOW_ENCODER
 {"w53", "5/3 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W53, INT_MIN, INT_MAX, V|E, "cmp_func"},
 {"w97", "9/7 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W97, INT_MIN, INT_MAX, V|E, "cmp_func"},
 #endif
diff --git a/libavcodec/pcm.c b/libavcodec/pcm.c
index 84aa098750..62dea0f54e 100644
--- a/libavcodec/pcm.c
+++ b/libavcodec/pcm.c
@@ -507,7 +507,7 @@ static int pcm_decode_frame(AVCodecContext *avctx,
     return src - buf;
 }
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
 #define PCM_ENCODER(id,sample_fmt_,name,long_name_) \
 AVCodec name ## _encoder = {                    \
     #name,                                      \
@@ -525,7 +525,7 @@ AVCodec name ## _encoder = {                    \
 #define PCM_ENCODER(id,sample_fmt_,name,long_name_)
 #endif
 
-#ifdef CONFIG_DECODERS
+#if CONFIG_DECODERS
 #define PCM_DECODER(id,sample_fmt_,name,long_name_)         \
 AVCodec name ## _decoder = {                    \
     #name,                                      \
diff --git a/libavcodec/pnmenc.c b/libavcodec/pnmenc.c
index b62ea759df..3ff120903f 100644
--- a/libavcodec/pnmenc.c
+++ b/libavcodec/pnmenc.c
@@ -354,7 +354,7 @@ static int pam_probe(AVProbeData *pd)
 #endif
 
 
-#ifdef CONFIG_PGM_ENCODER
+#if CONFIG_PGM_ENCODER
 AVCodec pgm_encoder = {
     "pgm",
     CODEC_TYPE_VIDEO,
@@ -369,7 +369,7 @@ AVCodec pgm_encoder = {
 };
 #endif // CONFIG_PGM_ENCODER
 
-#ifdef CONFIG_PGMYUV_ENCODER
+#if CONFIG_PGMYUV_ENCODER
 AVCodec pgmyuv_encoder = {
     "pgmyuv",
     CODEC_TYPE_VIDEO,
@@ -384,7 +384,7 @@ AVCodec pgmyuv_encoder = {
 };
 #endif // CONFIG_PGMYUV_ENCODER
 
-#ifdef CONFIG_PPM_ENCODER
+#if CONFIG_PPM_ENCODER
 AVCodec ppm_encoder = {
     "ppm",
     CODEC_TYPE_VIDEO,
@@ -399,7 +399,7 @@ AVCodec ppm_encoder = {
 };
 #endif // CONFIG_PPM_ENCODER
 
-#ifdef CONFIG_PBM_ENCODER
+#if CONFIG_PBM_ENCODER
 AVCodec pbm_encoder = {
     "pbm",
     CODEC_TYPE_VIDEO,
@@ -414,7 +414,7 @@ AVCodec pbm_encoder = {
 };
 #endif // CONFIG_PBM_ENCODER
 
-#ifdef CONFIG_PAM_ENCODER
+#if CONFIG_PAM_ENCODER
 AVCodec pam_encoder = {
     "pam",
     CODEC_TYPE_VIDEO,
diff --git a/libavcodec/ppc/dsputil_ppc.c b/libavcodec/ppc/dsputil_ppc.c
index 124453ef9b..b07468b27d 100644
--- a/libavcodec/ppc/dsputil_ppc.c
+++ b/libavcodec/ppc/dsputil_ppc.c
@@ -24,7 +24,7 @@
 
 #include "dsputil_ppc.h"
 
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
 #include "dsputil_altivec.h"
 
 void fdct_altivec(int16_t *block);
@@ -48,7 +48,7 @@ int mm_flags = 0;
 int mm_support(void)
 {
     int result = 0;
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
     if (has_altivec()) {
         result |= FF_MM_ALTIVEC;
     }
@@ -56,7 +56,7 @@ int mm_support(void)
     return result;
 }
 
-#ifdef CONFIG_POWERPC_PERF
+#if CONFIG_POWERPC_PERF
 unsigned long long perfdata[POWERPC_NUM_PMC_ENABLED][powerpc_perf_total][powerpc_data_total];
 /* list below must match enum in dsputil_ppc.h */
 static unsigned char* perfname[] = {
@@ -91,7 +91,7 @@ static unsigned char* perfname[] = {
 #include <stdio.h>
 #endif
 
-#ifdef CONFIG_POWERPC_PERF
+#if CONFIG_POWERPC_PERF
 void powerpc_display_perf_report(void)
 {
     int i, j;
@@ -165,7 +165,7 @@ POWERPC_PERF_STOP_COUNT(powerpc_clear_blocks_dcbz32, 1);
 
 /* same as above, when dcbzl clear a whole 128B cache line
    i.e. the PPC970 aka G5 */
-#ifdef HAVE_DCBZL
+#if HAVE_DCBZL
 void clear_blocks_dcbz128_ppc(DCTELEM *blocks)
 {
 POWERPC_PERF_DECLARE(powerpc_clear_blocks_dcbz128, 1);
@@ -195,7 +195,7 @@ void clear_blocks_dcbz128_ppc(DCTELEM *blocks)
 }
 #endif
 
-#ifdef HAVE_DCBZL
+#if HAVE_DCBZL
 /* check dcbz report how many bytes are set to 0 by dcbz */
 /* update 24/06/2003 : replace dcbz by dcbzl to get
    the intended effect (Apple "fixed" dcbz)
@@ -261,7 +261,7 @@ void dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx)
             break;
     }
 
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
     if(ENABLE_H264_DECODER) dsputil_h264_init_ppc(c, avctx);
 
     if (has_altivec()) {
@@ -275,7 +275,7 @@ void dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx)
         int_init_altivec(c, avctx);
         c->gmc1 = gmc1_altivec;
 
-#ifdef CONFIG_ENCODERS
+#if CONFIG_ENCODERS
         if (avctx->dct_algo == FF_DCT_AUTO ||
             avctx->dct_algo == FF_DCT_ALTIVEC) {
             c->fdct = fdct_altivec;
@@ -291,7 +291,7 @@ void dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx)
             }
         }
 
-#ifdef CONFIG_POWERPC_PERF
+#if CONFIG_POWERPC_PERF
         {
             int i, j;
             for (i = 0 ; i < powerpc_perf_total ; i++) {
diff --git a/libavcodec/ppc/dsputil_ppc.h b/libavcodec/ppc/dsputil_ppc.h
index 578c96120f..d9740ce592 100644
--- a/libavcodec/ppc/dsputil_ppc.h
+++ b/libavcodec/ppc/dsputil_ppc.h
@@ -21,7 +21,7 @@
 #ifndef AVCODEC_PPC_DSPUTIL_PPC_H
 #define AVCODEC_PPC_DSPUTIL_PPC_H
 
-#ifdef CONFIG_POWERPC_PERF
+#if CONFIG_POWERPC_PERF
 void powerpc_display_perf_report(void);
 /* the 604* have 2, the G3* have 4, the G4s have 6,
    and the G5 are completely different (they MUST use
@@ -68,7 +68,7 @@ enum powerpc_data_index {
 };
 extern unsigned long long perfdata[POWERPC_NUM_PMC_ENABLED][powerpc_perf_total][powerpc_data_total];
 
-#ifndef HAVE_PPC64
+#if !HAVE_PPC64
 #define POWERP_PMC_DATATYPE unsigned long
 #define POWERPC_GET_PMC1(a) __asm__ volatile("mfspr %0, 937" : "=r" (a))
 #define POWERPC_GET_PMC2(a) __asm__ volatile("mfspr %0, 938" : "=r" (a))
diff --git a/libavcodec/ppc/gcc_fixes.h b/libavcodec/ppc/gcc_fixes.h
index efa7a576cc..a97921f1f5 100644
--- a/libavcodec/ppc/gcc_fixes.h
+++ b/libavcodec/ppc/gcc_fixes.h
@@ -25,7 +25,7 @@
 
 #include "config.h"
 
-#ifdef HAVE_ALTIVEC_H
+#if HAVE_ALTIVEC_H
 #include <altivec.h>
 #endif
 
diff --git a/libavcodec/ppc/idct_altivec.c b/libavcodec/ppc/idct_altivec.c
index 94b6598c28..d262282bf0 100644
--- a/libavcodec/ppc/idct_altivec.c
+++ b/libavcodec/ppc/idct_altivec.c
@@ -161,7 +161,7 @@ void idct_put_altivec(uint8_t* dest, int stride, vec_s16* block)
 POWERPC_PERF_DECLARE(altivec_idct_put_num, 1);
     vec_u8 tmp;
 
-#ifdef CONFIG_POWERPC_PERF
+#if CONFIG_POWERPC_PERF
 POWERPC_PERF_START_COUNT(altivec_idct_put_num, 1);
 #endif
     IDCT
@@ -192,7 +192,7 @@ POWERPC_PERF_DECLARE(altivec_idct_add_num, 1);
     vec_u8 perm1;
     vec_u8 p0, p1, p;
 
-#ifdef CONFIG_POWERPC_PERF
+#if CONFIG_POWERPC_PERF
 POWERPC_PERF_START_COUNT(altivec_idct_add_num, 1);
 #endif
 
diff --git a/libavcodec/ppc/mathops.h b/libavcodec/ppc/mathops.h
index edfe2ea242..beba351787 100644
--- a/libavcodec/ppc/mathops.h
+++ b/libavcodec/ppc/mathops.h
@@ -23,7 +23,7 @@
 #ifndef AVCODEC_PPC_MATHOPS_H
 #define AVCODEC_PPC_MATHOPS_H
 
-#if defined(ARCH_PPC_405)
+#if ARCH_PPC_405
 /* signed 16x16 -> 32 multiply add accumulate */
 #define MAC16(rt, ra, rb) \
     __asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
diff --git a/libavcodec/ppc/util_altivec.h b/libavcodec/ppc/util_altivec.h
index c54d0ea4c1..b52c159136 100644
--- a/libavcodec/ppc/util_altivec.h
+++ b/libavcodec/ppc/util_altivec.h
@@ -28,7 +28,7 @@
 
 #include "config.h"
 
-#ifdef HAVE_ALTIVEC_H
+#if HAVE_ALTIVEC_H
 #include <altivec.h>
 #endif
 
diff --git a/libavcodec/qdm2.c b/libavcodec/qdm2.c
index e1b67d0c19..9727d599ac 100644
--- a/libavcodec/qdm2.c
+++ b/libavcodec/qdm2.c
@@ -39,7 +39,7 @@
 #include "bitstream.h"
 #include "dsputil.h"
 
-#ifdef CONFIG_MPEGAUDIO_HP
+#if CONFIG_MPEGAUDIO_HP
 #define USE_HIGHPRECISION
 #endif
 
diff --git a/libavcodec/ratecontrol.c b/libavcodec/ratecontrol.c
index c88059aa41..31c3da79b4 100644
--- a/libavcodec/ratecontrol.c
+++ b/libavcodec/ratecontrol.c
@@ -184,7 +184,7 @@ int ff_rate_control_init(MpegEncContext *s)
 
         //FIXME maybe move to end
         if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID) {
-#ifdef CONFIG_LIBXVID
+#if CONFIG_LIBXVID
             return ff_xvid_rate_control_init(s);
 #else
             av_log(s->avctx, AV_LOG_ERROR, "Xvid ratecontrol requires libavcodec compiled with Xvid support.\n");
@@ -260,7 +260,7 @@ void ff_rate_control_uninit(MpegEncContext *s)
     ff_eval_free(rcc->rc_eq_eval);
     av_freep(&rcc->entry);
 
-#ifdef CONFIG_LIBXVID
+#if CONFIG_LIBXVID
     if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)
         ff_xvid_rate_control_uninit(s);
 #endif
@@ -678,7 +678,7 @@ float ff_rate_estimate_qscale(MpegEncContext *s, int dry_run)
     Picture * const pic= &s->current_picture;
     emms_c();
 
-#ifdef CONFIG_LIBXVID
+#if CONFIG_LIBXVID
     if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)
         return ff_xvid_rate_estimate_qscale(s, dry_run);
 #endif
diff --git a/libavcodec/rectangle.h b/libavcodec/rectangle.h
index a1dfb5cf99..563c988030 100644
--- a/libavcodec/rectangle.h
+++ b/libavcodec/rectangle.h
@@ -64,7 +64,7 @@ static av_always_inline void fill_rectangle(void *vp, int w, int h, int stride,
         *(uint32_t*)(p + 3*stride)= v;
     }else if(w==8){
     //gcc can't optimize 64bit math on x86_32
-#ifdef HAVE_FAST_64BIT
+#if HAVE_FAST_64BIT
         const uint64_t v= val*0x0100000001ULL;
         *(uint64_t*)(p + 0*stride)= v;
         if(h==1) return;
diff --git a/libavcodec/rv10.c b/libavcodec/rv10.c
index ad09c07a09..cba319c5b1 100644
--- a/libavcodec/rv10.c
+++ b/libavcodec/rv10.c
@@ -230,7 +230,7 @@ int rv_decode_dc(MpegEncContext *s, int n)
 }
 
 
-#if defined(CONFIG_RV10_ENCODER) || defined(CONFIG_RV20_ENCODER)
+#if CONFIG_RV10_ENCODER || CONFIG_RV20_ENCODER
 /* write RV 1.0 compatible frame header */
 void rv10_encode_picture_header(MpegEncContext *s, int picture_number)
 {
@@ -304,7 +304,7 @@ static int get_num(GetBitContext *gb)
 }
 #endif
 
-#endif /* defined(CONFIG_RV10_ENCODER) || defined(CONFIG_RV20_ENCODER) */
+#endif /* CONFIG_RV10_ENCODER || CONFIG_RV20_ENCODER */
 
 /* read RV 1.0 compatible frame header */
 static int rv10_decode_picture_header(MpegEncContext *s)
diff --git a/libavcodec/simple_idct.c b/libavcodec/simple_idct.c
index 2cf9e8de98..914b491ec9 100644
--- a/libavcodec/simple_idct.c
+++ b/libavcodec/simple_idct.c
@@ -59,13 +59,13 @@
 static inline void idctRowCondDC (DCTELEM * row)
 {
         int a0, a1, a2, a3, b0, b1, b2, b3;
-#ifdef HAVE_FAST_64BIT
+#if HAVE_FAST_64BIT
         uint64_t temp;
 #else
         uint32_t temp;
 #endif
 
-#ifdef HAVE_FAST_64BIT
+#if HAVE_FAST_64BIT
 #ifdef WORDS_BIGENDIAN
 #define ROW0_MASK 0xffff000000000000LL
 #else
@@ -127,7 +127,7 @@ static inline void idctRowCondDC (DCTELEM * row)
         b3 = MUL16(W7, row[1]);
         MAC16(b3, -W5, row[3]);
 
-#ifdef HAVE_FAST_64BIT
+#if HAVE_FAST_64BIT
         temp = ((uint64_t*)row)[1];
 #else
         temp = ((uint32_t*)row)[2] | ((uint32_t*)row)[3];
diff --git a/libavcodec/snow.c b/libavcodec/snow.c
index e3e5aa9b1c..0e60d49a01 100644
--- a/libavcodec/snow.c
+++ b/libavcodec/snow.c
@@ -4670,7 +4670,7 @@ AVCodec snow_decoder = {
     .long_name = NULL_IF_CONFIG_SMALL("Snow"),
 };
 
-#ifdef CONFIG_SNOW_ENCODER
+#if CONFIG_SNOW_ENCODER
 AVCodec snow_encoder = {
     "snow",
     CODEC_TYPE_VIDEO,
diff --git a/libavcodec/snow.h b/libavcodec/snow.h
index b208e5fe6a..5d5ae1e68a 100644
--- a/libavcodec/snow.h
+++ b/libavcodec/snow.h
@@ -125,7 +125,7 @@ void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTE
 void ff_snow_horizontal_compose97i(IDWTELEM *b, int width);
 void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h, int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8);
 
-#ifdef CONFIG_SNOW_ENCODER
+#if CONFIG_SNOW_ENCODER
 int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
 int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
 #else
diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c
index 6e0bdc839b..44b4582682 100644
--- a/libavcodec/sonic.c
+++ b/libavcodec/sonic.c
@@ -408,7 +408,7 @@ static int predictor_calc_error(int *k, int *state, int order, int error)
     return x;
 }
 
-#if defined(CONFIG_SONIC_ENCODER) || defined(CONFIG_SONIC_LS_ENCODER)
+#if CONFIG_SONIC_ENCODER || CONFIG_SONIC_LS_ENCODER
 // Heavily modified Levinson-Durbin algorithm which
 // copes better with quantization, and calculates the
 // actual whitened result as it goes.
@@ -479,12 +479,12 @@ static void modified_levinson_durbin(int *window, int window_entries,
 
     av_free(state);
 }
-#endif /* defined(CONFIG_SONIC_ENCODER) || defined(CONFIG_SONIC_LS_ENCODER) */
+#endif /* CONFIG_SONIC_ENCODER || CONFIG_SONIC_LS_ENCODER */
 
 static const int samplerate_table[] =
     { 44100, 22050, 11025, 96000, 48000, 32000, 24000, 16000, 8000 };
 
-#if defined(CONFIG_SONIC_ENCODER) || defined(CONFIG_SONIC_LS_ENCODER)
+#if CONFIG_SONIC_ENCODER || CONFIG_SONIC_LS_ENCODER
 static inline int code_samplerate(int samplerate)
 {
     switch (samplerate)
@@ -747,9 +747,9 @@ static int sonic_encode_frame(AVCodecContext *avctx,
     flush_put_bits(&pb);
     return (put_bits_count(&pb)+7)/8;
 }
-#endif /* defined(CONFIG_SONIC_ENCODER) || defined(CONFIG_SONIC_LS_ENCODER) */
+#endif /* CONFIG_SONIC_ENCODER || CONFIG_SONIC_LS_ENCODER */
 
-#ifdef CONFIG_SONIC_DECODER
+#if CONFIG_SONIC_DECODER
 static av_cold int sonic_decode_init(AVCodecContext *avctx)
 {
     SonicContext *s = avctx->priv_data;
@@ -936,7 +936,7 @@ static int sonic_decode_frame(AVCodecContext *avctx,
 }
 #endif /* CONFIG_SONIC_DECODER */
 
-#ifdef CONFIG_SONIC_ENCODER
+#if CONFIG_SONIC_ENCODER
 AVCodec sonic_encoder = {
     "sonic",
     CODEC_TYPE_AUDIO,
@@ -950,7 +950,7 @@ AVCodec sonic_encoder = {
 };
 #endif
 
-#ifdef CONFIG_SONIC_LS_ENCODER
+#if CONFIG_SONIC_LS_ENCODER
 AVCodec sonic_ls_encoder = {
     "sonicls",
     CODEC_TYPE_AUDIO,
@@ -964,7 +964,7 @@ AVCodec sonic_ls_encoder = {
 };
 #endif
 
-#ifdef CONFIG_SONIC_DECODER
+#if CONFIG_SONIC_DECODER
 AVCodec sonic_decoder = {
     "sonic",
     CODEC_TYPE_AUDIO,
diff --git a/libavcodec/svq1enc.c b/libavcodec/svq1enc.c
index 49ad3d31bb..2a96f34b9e 100644
--- a/libavcodec/svq1enc.c
+++ b/libavcodec/svq1enc.c
@@ -119,7 +119,7 @@ static void svq1_write_header(SVQ1Context *s, int frame_type)
 #define QUALITY_THRESHOLD 100
 #define THRESHOLD_MULTIPLIER 0.6
 
-#if defined(HAVE_ALTIVEC)
+#if HAVE_ALTIVEC
 #undef vector
 #endif
 
diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index f438ba8262..e3f014a3de 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -40,7 +40,7 @@
  *  http://samples.mplayerhq.hu/V-codecs/SVQ3/Vertical400kbit.sorenson3.mov
  */
 
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
 #include <zlib.h>
 #endif
 
@@ -849,7 +849,7 @@ static int svq3_decode_init(AVCodecContext *avctx)
             h->unknown_svq3_flag = get_bits1(&gb);
             avctx->has_b_frames = !s->low_delay;
             if (h->unknown_svq3_flag) {
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
                 unsigned watermark_width  = svq3_get_ue_golomb(&gb);
                 unsigned watermark_height = svq3_get_ue_golomb(&gb);
                 int u1 = svq3_get_ue_golomb(&gb);
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 582076bede..9880391bc8 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -25,7 +25,7 @@
  * @author Konstantin Shishkov
  */
 #include "avcodec.h"
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
 #include <zlib.h>
 #endif
 #include "lzw.h"
@@ -78,7 +78,7 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uin
     int c, line, pixels, code;
     const uint8_t *ssrc = src;
     int width = s->width * s->bpp >> 3;
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     uint8_t *zbuf; unsigned long outlen;
 
     if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
@@ -298,7 +298,7 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
             break;
         case TIFF_DEFLATE:
         case TIFF_ADOBE_DEFLATE:
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
             break;
 #else
             av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
diff --git a/libavcodec/tiffenc.c b/libavcodec/tiffenc.c
index c44045435b..6d95e89058 100644
--- a/libavcodec/tiffenc.c
+++ b/libavcodec/tiffenc.c
@@ -25,7 +25,7 @@
  * @author Bartlomiej Wolowiec
  */
 #include "avcodec.h"
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
 #include <zlib.h>
 #endif
 #include "bytestream.h"
@@ -151,7 +151,7 @@ static int encode_strip(TiffEncoderContext * s, const int8_t * src,
 {
 
     switch (compr) {
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     case TIFF_DEFLATE:
     case TIFF_ADOBE_DEFLATE:
         {
@@ -229,7 +229,7 @@ static int encode_frame(AVCodecContext * avctx, unsigned char *buf,
         s->compr = TIFF_RAW;
     } else if(avctx->compression_level == 2) {
         s->compr = TIFF_LZW;
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     } else if ((avctx->compression_level >= 3)) {
         s->compr = TIFF_DEFLATE;
 #endif
@@ -315,7 +315,7 @@ static int encode_frame(AVCodecContext * avctx, unsigned char *buf,
         }
     }
 
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
         uint8_t *zbuf;
         int zlen, zn;
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 0d2d657bd7..72531a80f8 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -40,7 +40,7 @@
 #include <stdarg.h>
 #include <limits.h>
 #include <float.h>
-#if !defined(HAVE_MKSTEMP)
+#if !HAVE_MKSTEMP
 #include <fcntl.h>
 #endif
 
@@ -251,7 +251,7 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
 //picture size unneccessarily in some cases. The solution here is not
 //pretty and better ideas are welcome!
-#ifdef HAVE_MMX
+#if HAVE_MMX
             if(s->codec_id == CODEC_ID_SVQ1)
                 stride_align[i]= 16;
             else
@@ -900,7 +900,7 @@ int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
     }
 }
 
-#if !defined(HAVE_THREADS)
+#if !HAVE_THREADS
 int avcodec_thread_init(AVCodecContext *s, int thread_count){
     return -1;
 }
@@ -927,7 +927,7 @@ unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
  * and opened file name in **filename. */
 int av_tempfile(char *prefix, char **filename) {
     int fd=-1;
-#if !defined(HAVE_MKSTEMP)
+#if !HAVE_MKSTEMP
     *filename = tempnam(".", prefix);
 #else
     size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
@@ -938,7 +938,7 @@ int av_tempfile(char *prefix, char **filename) {
         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
         return -1;
     }
-#if !defined(HAVE_MKSTEMP)
+#if !HAVE_MKSTEMP
     fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
 #else
     snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
diff --git a/libavcodec/vcr1.c b/libavcodec/vcr1.c
index d9d4ce9f61..c3b35567ea 100644
--- a/libavcodec/vcr1.c
+++ b/libavcodec/vcr1.c
@@ -32,6 +32,7 @@
 
 /* Disable the encoder. */
 #undef CONFIG_VCR1_ENCODER
+#define CONFIG_VCR1_ENCODER 0
 
 typedef struct VCR1Context{
     AVCodecContext *avctx;
@@ -116,7 +117,7 @@ static int decode_frame(AVCodecContext *avctx,
     return buf_size;
 }
 
-#ifdef CONFIG_VCR1_ENCODER
+#if CONFIG_VCR1_ENCODER
 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
     VCR1Context * const a = avctx->priv_data;
     AVFrame *pict = data;
@@ -156,7 +157,7 @@ static av_cold int decode_init(AVCodecContext *avctx){
     return 0;
 }
 
-#ifdef CONFIG_VCR1_ENCODER
+#if CONFIG_VCR1_ENCODER
 static av_cold int encode_init(AVCodecContext *avctx){
 
     common_init(avctx);
@@ -178,7 +179,7 @@ AVCodec vcr1_decoder = {
     .long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
 };
 
-#ifdef CONFIG_VCR1_ENCODER
+#if CONFIG_VCR1_ENCODER
 AVCodec vcr1_encoder = {
     "vcr1",
     CODEC_TYPE_VIDEO,
diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
index 27370253ce..73e285eda2 100644
--- a/libavcodec/vp3.c
+++ b/libavcodec/vp3.c
@@ -2021,7 +2021,7 @@ static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
     return 0;
 }
 
-#ifdef CONFIG_THEORA_DECODER
+#if CONFIG_THEORA_DECODER
 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
 {
     Vp3DecodeContext *s = avctx->priv_data;
diff --git a/libavcodec/x86/cpuid.c b/libavcodec/x86/cpuid.c
index 664bac35ab..033ac0dd5f 100644
--- a/libavcodec/x86/cpuid.c
+++ b/libavcodec/x86/cpuid.c
@@ -44,7 +44,7 @@ int mm_support(void)
     int max_std_level, max_ext_level, std_caps=0, ext_caps=0;
     x86_reg a, c;
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 #define PUSHF "pushfq\n\t"
 #define POPF "popfq\n\t"
 #else
@@ -83,7 +83,7 @@ int mm_support(void)
             rval |= FF_MM_MMX;
         if (std_caps & (1<<25))
             rval |= FF_MM_MMXEXT
-#ifdef HAVE_SSE
+#if HAVE_SSE
                   | FF_MM_SSE;
         if (std_caps & (1<<26))
             rval |= FF_MM_SSE2;
diff --git a/libavcodec/x86/dsputil_mmx.c b/libavcodec/x86/dsputil_mmx.c
index 1d93351507..0423da16fe 100644
--- a/libavcodec/x86/dsputil_mmx.c
+++ b/libavcodec/x86/dsputil_mmx.c
@@ -880,7 +880,7 @@ static void add_png_paeth_prediction_##cpu(uint8_t *dst, uint8_t *src, uint8_t *
         "pabsw     %%mm5, %%mm5 \n"
 
 PAETH(mmx2, ABS3_MMX2)
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
 PAETH(ssse3, ABS3_SSSE3)
 #endif
 
@@ -1765,7 +1765,7 @@ void ff_mmxext_idct(DCTELEM *block);
 
 /* XXX: those functions should be suppressed ASAP when all IDCTs are
    converted */
-#ifdef CONFIG_GPL
+#if CONFIG_GPL
 static void ff_libmpeg2mmx_idct_put(uint8_t *dest, int line_size, DCTELEM *block)
 {
     ff_mmx_idct (block);
@@ -2147,7 +2147,7 @@ static void vector_fmul_add_add_sse(float *dst, const float *src0, const float *
 
 static void vector_fmul_window_3dnow2(float *dst, const float *src0, const float *src1,
                                       const float *win, float add_bias, int len){
-#ifdef HAVE_6REGS
+#if HAVE_6REGS
     if(add_bias == 0){
         x86_reg i = -len*4;
         x86_reg j = len*4-8;
@@ -2182,7 +2182,7 @@ static void vector_fmul_window_3dnow2(float *dst, const float *src0, const float
 
 static void vector_fmul_window_sse(float *dst, const float *src0, const float *src1,
                                    const float *win, float add_bias, int len){
-#ifdef HAVE_6REGS
+#if HAVE_6REGS
     if(add_bias == 0){
         x86_reg i = -len*4;
         x86_reg j = len*4-16;
@@ -2324,7 +2324,7 @@ static void float_to_int16_sse2(int16_t *dst, const float *src, long len){
     );
 }
 
-#ifdef HAVE_YASM
+#if HAVE_YASM
 void ff_float_to_int16_interleave6_sse(int16_t *dst, const float **src, int len);
 void ff_float_to_int16_interleave6_3dnow(int16_t *dst, const float **src, int len);
 void ff_float_to_int16_interleave6_3dn2(int16_t *dst, const float **src, int len);
@@ -2332,7 +2332,7 @@ void ff_x264_deblock_v_luma_sse2(uint8_t *pix, int stride, int alpha, int beta,
 void ff_x264_deblock_h_luma_sse2(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0);
 void ff_x264_deblock_v8_luma_intra_mmxext(uint8_t *pix, int stride, int alpha, int beta);
 void ff_x264_deblock_h_luma_intra_mmxext(uint8_t *pix, int stride, int alpha, int beta);
-#ifdef ARCH_X86_32
+#if ARCH_X86_32
 static void ff_x264_deblock_v_luma_intra_mmxext(uint8_t *pix, int stride, int alpha, int beta)
 {
     ff_x264_deblock_v8_luma_intra_mmxext(pix+0, stride, alpha, beta);
@@ -2555,7 +2555,7 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
                 c->idct_add= ff_simple_idct_add_mmx;
                 c->idct    = ff_simple_idct_mmx;
                 c->idct_permutation_type= FF_SIMPLE_IDCT_PERM;
-#ifdef CONFIG_GPL
+#if CONFIG_GPL
             }else if(idct_algo==FF_IDCT_LIBMPEG2MMX){
                 if(mm_flags & FF_MM_MMXEXT){
                     c->idct_put= ff_libmpeg2mmx2_idct_put;
@@ -2853,7 +2853,7 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
             H264_QPEL_FUNCS(3, 2, sse2);
             H264_QPEL_FUNCS(3, 3, sse2);
         }
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
         if(mm_flags & FF_MM_SSSE3){
             H264_QPEL_FUNCS(1, 0, ssse3);
             H264_QPEL_FUNCS(1, 1, ssse3);
@@ -2876,14 +2876,14 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
         }
 #endif
 
-#if defined(CONFIG_GPL) && defined(HAVE_YASM)
+#if CONFIG_GPL && HAVE_YASM
         if( mm_flags&FF_MM_MMXEXT ){
-#ifdef ARCH_X86_32
+#if ARCH_X86_32
             c->h264_v_loop_filter_luma_intra = ff_x264_deblock_v_luma_intra_mmxext;
             c->h264_h_loop_filter_luma_intra = ff_x264_deblock_h_luma_intra_mmxext;
 #endif
             if( mm_flags&FF_MM_SSE2 ){
-#if defined(ARCH_X86_64) || !defined(__ICC) || __ICC > 1100
+#if ARCH_X86_64 || !defined(__ICC) || __ICC > 1100
                 c->h264_v_loop_filter_luma = ff_x264_deblock_v_luma_sse2;
                 c->h264_h_loop_filter_luma = ff_x264_deblock_h_luma_sse2;
                 c->h264_v_loop_filter_luma_intra = ff_x264_deblock_v_luma_intra_sse2;
@@ -2896,10 +2896,10 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
         }
 #endif
 
-#ifdef CONFIG_SNOW_DECODER
+#if CONFIG_SNOW_DECODER
         if(mm_flags & FF_MM_SSE2 & 0){
             c->horizontal_compose97i = ff_snow_horizontal_compose97i_sse2;
-#ifdef HAVE_7REGS
+#if HAVE_7REGS
             c->vertical_compose97i = ff_snow_vertical_compose97i_sse2;
 #endif
             c->inner_add_yblock = ff_snow_inner_add_yblock_sse2;
@@ -2907,7 +2907,7 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
         else{
             if(mm_flags & FF_MM_MMXEXT){
             c->horizontal_compose97i = ff_snow_horizontal_compose97i_mmx;
-#ifdef HAVE_7REGS
+#if HAVE_7REGS
             c->vertical_compose97i = ff_snow_vertical_compose97i_mmx;
 #endif
             }
diff --git a/libavcodec/x86/dsputil_mmx.h b/libavcodec/x86/dsputil_mmx.h
index 87617e3016..3124519c51 100644
--- a/libavcodec/x86/dsputil_mmx.h
+++ b/libavcodec/x86/dsputil_mmx.h
@@ -104,7 +104,7 @@ extern const double ff_pd_2[2];
     SBUTTERFLY(t, b, c, wd, q)   /* t= a2 b2 c2 d2 e2 f2 g2 h2 */\
                                  /* c= a3 b3 c3 d3 e3 f3 g3 h3 */
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 // permutes 01234567 -> 05736421
 #define TRANSPOSE8(a,b,c,d,e,f,g,h,t)\
     SBUTTERFLY(a,b,%%xmm8,wd,dqa)\
diff --git a/libavcodec/x86/dsputilenc_mmx.c b/libavcodec/x86/dsputilenc_mmx.c
index 76b367822b..e8a3e11ebe 100644
--- a/libavcodec/x86/dsputilenc_mmx.c
+++ b/libavcodec/x86/dsputilenc_mmx.c
@@ -1015,7 +1015,7 @@ static void sub_hfyu_median_prediction_mmx2(uint8_t *dst, uint8_t *src1, uint8_t
     MMABS_SUM(%%xmm7, %%xmm9, %%xmm1)\
     "paddusw %%xmm1, %%xmm0           \n\t"
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 #define MMABS_SUM_8x8_SSE2 MMABS_SUM_8x8_NOSPILL
 #else
 #define MMABS_SUM_8x8_SSE2\
@@ -1180,7 +1180,7 @@ HADAMARD8_DIFF_SSE2(sse2)
 #undef MMABS_SUM_8x8
 #undef HSUM
 
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
 #define MMABS(a,z)         MMABS_SSSE3(a,z)
 #define MMABS_SUM_8x8      MMABS_SUM_8x8_NOSPILL
 HADAMARD8_DIFF_SSE2(ssse3)
@@ -1245,7 +1245,7 @@ DCT_SAD_FUNC(mmx2)
 DCT_SAD_FUNC(sse2)
 #undef MMABS
 
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
 #define MMABS(a,z)    MMABS_SSSE3(a,z)
 DCT_SAD_FUNC(ssse3)
 #undef MMABS
@@ -1325,7 +1325,7 @@ static int ssd_int8_vs_int16_mmx(const int8_t *pix1, const int16_t *pix2, int si
 #undef SCALE_OFFSET
 #undef PMULHRW
 
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
 #undef PHADDD
 #define DEF(x) x ## _ssse3
 #define SET_RND(x)
@@ -1417,7 +1417,7 @@ void dsputilenc_init_mmx(DSPContext* c, AVCodecContext *avctx)
                 c->flac_compute_autocorr = ff_flac_compute_autocorr_sse2;
         }
 
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
         if(mm_flags & FF_MM_SSSE3){
             if(!(avctx->flags & CODEC_FLAG_BITEXACT)){
                 c->try_8x8basis= try_8x8basis_ssse3;
diff --git a/libavcodec/x86/fft_sse.c b/libavcodec/x86/fft_sse.c
index deced3b929..3d9f1c5145 100644
--- a/libavcodec/x86/fft_sse.c
+++ b/libavcodec/x86/fft_sse.c
@@ -108,7 +108,7 @@ void ff_imdct_half_sse(MDCTContext *s, FFTSample *output, const FFTSample *input
             ::"r"(-4*k), "r"(4*k),
               "r"(input+n4), "r"(tcos+n8), "r"(tsin+n8)
         );
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
         // if we have enough regs, don't let gcc make the luts latency-bound
         // but if not, latency is faster than spilling
         __asm__("movlps %%xmm0, %0 \n"
diff --git a/libavcodec/x86/h264_i386.h b/libavcodec/x86/h264_i386.h
index 909c27490d..2394a8e491 100644
--- a/libavcodec/x86/h264_i386.h
+++ b/libavcodec/x86/h264_i386.h
@@ -33,9 +33,7 @@
 
 //FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
 //as that would make optimization work hard)
-#if defined(ARCH_X86) && defined(HAVE_7REGS)     && \
-    defined(HAVE_EBX_AVAILABLE)                  && \
-    !defined(BROKEN_RELOCATIONS)
+#if ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)
 static int decode_significance_x86(CABACContext *c, int max_coeff,
                                    uint8_t *significant_coeff_ctx_base,
                                    int *index){
@@ -149,7 +147,7 @@ static int decode_significance_8x8_x86(CABACContext *c,
     );
     return coeff_count;
 }
-#endif /* defined(ARCH_X86) && defined(HAVE_7REGS) &&                 */
-       /* defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */
+#endif /* ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE */
+       /* !defined(BROKEN_RELOCATIONS) */
 
 #endif /* AVCODEC_X86_H264_I386_H */
diff --git a/libavcodec/x86/h264dsp_mmx.c b/libavcodec/x86/h264dsp_mmx.c
index 8eeb65779b..9342d78ea0 100644
--- a/libavcodec/x86/h264dsp_mmx.c
+++ b/libavcodec/x86/h264dsp_mmx.c
@@ -472,7 +472,7 @@ static void ff_h264_idct_add8_mmx2(uint8_t **dest, const int *block_offset, DCTE
     }
 }
 
-#if defined(CONFIG_GPL) && defined(HAVE_YASM)
+#if CONFIG_GPL && HAVE_YASM
 static void ff_h264_idct_dc_add8_mmx2(uint8_t *dst, int16_t *block, int stride)
 {
     __asm__ volatile(
@@ -1488,7 +1488,7 @@ static void OPNAME ## pixels16_l2_shift5_ ## MMX(uint8_t *dst, int16_t *src16, u
 }\
 
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 #define QPEL_H264_H16_XMM(OPNAME, OP, MMX)\
 static av_noinline void OPNAME ## h264_qpel16_h_lowpass_l2_ ## MMX(uint8_t *dst, uint8_t *src, uint8_t *src2, int dstStride, int src2Stride){\
     int h=16;\
@@ -2065,7 +2065,7 @@ QPEL_H264_V_XMM(put_,       PUT_OP, sse2)
 QPEL_H264_V_XMM(avg_,  AVG_MMX2_OP, sse2)
 QPEL_H264_HV_XMM(put_,       PUT_OP, sse2)
 QPEL_H264_HV_XMM(avg_,  AVG_MMX2_OP, sse2)
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
 QPEL_H264_H_XMM(put_,       PUT_OP, ssse3)
 QPEL_H264_H_XMM(avg_,  AVG_MMX2_OP, ssse3)
 QPEL_H264_HV2_XMM(put_,       PUT_OP, ssse3)
@@ -2079,7 +2079,7 @@ H264_MC_4816(3dnow)
 H264_MC_4816(mmx2)
 H264_MC_816(H264_MC_V, sse2)
 H264_MC_816(H264_MC_HV, sse2)
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
 H264_MC_816(H264_MC_H, ssse3)
 H264_MC_816(H264_MC_HV, ssse3)
 #endif
@@ -2161,7 +2161,7 @@ static void avg_h264_chroma_mc4_3dnow(uint8_t *dst/*align 8*/, uint8_t *src/*ali
 #undef H264_CHROMA_MC4_TMPL
 #undef H264_CHROMA_MC8_MV0
 
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
 #define AVG_OP(X)
 #undef H264_CHROMA_MC8_TMPL
 #undef H264_CHROMA_MC4_TMPL
diff --git a/libavcodec/x86/idct_sse2_xvid.c b/libavcodec/x86/idct_sse2_xvid.c
index d8711a2ee2..789167f712 100644
--- a/libavcodec/x86/idct_sse2_xvid.c
+++ b/libavcodec/x86/idct_sse2_xvid.c
@@ -103,7 +103,7 @@ DECLARE_ASM_CONST(16, int32_t, walkenIdctRounders[]) = {
 #define CLEAR_ODD(r) "pxor  "r","r" \n\t"
 #define PUT_ODD(dst) "pshufhw  $0x1B, %%xmm2, "dst"   \n\t"
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 
 # define ROW0 "%%xmm8"
 # define REG0 ROW0
@@ -371,7 +371,7 @@ inline void ff_idct_xvid_sse2(short *block)
     JZ("%%esi", "1f")
     "5:                                                          \n\t"
     iMTX_MULT("7*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders+5*16), PUT_ODD(ROW7))
-#ifndef ARCH_X86_64
+#if !ARCH_X86_64
     iLLM_HEAD
 #endif
     iLLM_PASS("%0")
diff --git a/libavcodec/x86/mpegvideo_mmx.c b/libavcodec/x86/mpegvideo_mmx.c
index 406d3b8c07..2abd4d5c01 100644
--- a/libavcodec/x86/mpegvideo_mmx.c
+++ b/libavcodec/x86/mpegvideo_mmx.c
@@ -583,25 +583,30 @@ static void  denoise_dct_sse2(MpegEncContext *s, DCTELEM *block){
     );
 }
 
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
 #define HAVE_SSSE3_BAK
 #endif
 #undef HAVE_SSSE3
+#define HAVE_SSSE3 0
 
 #undef HAVE_SSE2
 #undef HAVE_MMX2
+#define HAVE_SSE2 0
+#define HAVE_MMX2 0
 #define RENAME(a) a ## _MMX
 #define RENAMEl(a) a ## _mmx
 #include "mpegvideo_mmx_template.c"
 
-#define HAVE_MMX2
+#undef HAVE_MMX2
+#define HAVE_MMX2 1
 #undef RENAME
 #undef RENAMEl
 #define RENAME(a) a ## _MMX2
 #define RENAMEl(a) a ## _mmx2
 #include "mpegvideo_mmx_template.c"
 
-#define HAVE_SSE2
+#undef HAVE_SSE2
+#define HAVE_SSE2 1
 #undef RENAME
 #undef RENAMEl
 #define RENAME(a) a ## _SSE2
@@ -609,7 +614,8 @@ static void  denoise_dct_sse2(MpegEncContext *s, DCTELEM *block){
 #include "mpegvideo_mmx_template.c"
 
 #ifdef HAVE_SSSE3_BAK
-#define HAVE_SSSE3
+#undef HAVE_SSSE3
+#define HAVE_SSSE3 1
 #undef RENAME
 #undef RENAMEl
 #define RENAME(a) a ## _SSSE3
@@ -637,7 +643,7 @@ void MPV_common_init_mmx(MpegEncContext *s)
         }
 
         if(dct_algo==FF_DCT_AUTO || dct_algo==FF_DCT_MMX){
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
             if(mm_flags & FF_MM_SSSE3){
                 s->dct_quantize= dct_quantize_SSSE3;
             } else
diff --git a/libavcodec/x86/mpegvideo_mmx_template.c b/libavcodec/x86/mpegvideo_mmx_template.c
index a1aae5fdd4..dbc94d36dc 100644
--- a/libavcodec/x86/mpegvideo_mmx_template.c
+++ b/libavcodec/x86/mpegvideo_mmx_template.c
@@ -29,7 +29,7 @@
 #undef SAVE_SIGN
 #undef RESTORE_SIGN
 
-#if defined(HAVE_SSE2)
+#if HAVE_SSE2
 #define MMREG_WIDTH "16"
 #define MM "%%xmm"
 #define MOVQ "movdqa"
@@ -48,7 +48,7 @@
 #define MMREG_WIDTH "8"
 #define MM "%%mm"
 #define MOVQ "movq"
-#if defined(HAVE_MMX2)
+#if HAVE_MMX2
 #define SPREADW(a) "pshufw $0, "a", "a" \n\t"
 #define PMAXW(a,b) "pmaxsw "a", "b"     \n\t"
 #define PMAX(a,b) \
@@ -74,7 +74,7 @@
 #endif
 #endif
 
-#ifdef HAVE_SSSE3
+#if HAVE_SSSE3
 #define SAVE_SIGN(a,b) \
             "movdqa "b", "a"            \n\t"\
             "pabsw  "b", "b"            \n\t"
@@ -219,7 +219,7 @@ static int RENAME(dct_quantize)(MpegEncContext *s,
         SPREADW(MM"1")
         "psubusw "MM"1, "MM"4               \n\t"
         "packuswb "MM"4, "MM"4              \n\t"
-#ifdef HAVE_SSE2
+#if HAVE_SSE2
         "packuswb "MM"4, "MM"4              \n\t"
 #endif
         "movd "MM"4, %0                     \n\t" // *overflow
diff --git a/libavcodec/x86/snowdsp_mmx.c b/libavcodec/x86/snowdsp_mmx.c
index 93119787fd..8374a63661 100644
--- a/libavcodec/x86/snowdsp_mmx.c
+++ b/libavcodec/x86/snowdsp_mmx.c
@@ -386,7 +386,7 @@ void ff_snow_horizontal_compose97i_mmx(IDWTELEM *b, int width){
     }
 }
 
-#ifdef HAVE_7REGS
+#if HAVE_7REGS
 #define snow_vertical_compose_sse2_load_add(op,r,t0,t1,t2,t3)\
         ""op" ("r",%%"REG_d"), %%"t0"      \n\t"\
         ""op" 16("r",%%"REG_d"), %%"t1"    \n\t"\
diff --git a/libavdevice/audio.c b/libavdevice/audio.c
index d056711d03..4344ecb4f1 100644
--- a/libavdevice/audio.c
+++ b/libavdevice/audio.c
@@ -25,7 +25,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <errno.h>
-#ifdef HAVE_SOUNDCARD_H
+#if HAVE_SOUNDCARD_H
 #include <soundcard.h>
 #else
 #include <sys/soundcard.h>
@@ -311,7 +311,7 @@ static int audio_read_close(AVFormatContext *s1)
     return 0;
 }
 
-#ifdef CONFIG_OSS_DEMUXER
+#if CONFIG_OSS_DEMUXER
 AVInputFormat oss_demuxer = {
     "oss",
     NULL_IF_CONFIG_SMALL("Open Sound System capture"),
@@ -324,7 +324,7 @@ AVInputFormat oss_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_OSS_MUXER
+#if CONFIG_OSS_MUXER
 AVOutputFormat oss_muxer = {
     "oss",
     NULL_IF_CONFIG_SMALL("Open Sound System playback"),
diff --git a/libavdevice/beosaudio.cpp b/libavdevice/beosaudio.cpp
index def1fad608..84e7c77905 100644
--- a/libavdevice/beosaudio.cpp
+++ b/libavdevice/beosaudio.cpp
@@ -33,7 +33,7 @@ extern "C" {
 #include "libavformat/avformat.h"
 }
 
-#ifdef HAVE_BSOUNDRECORDER
+#if HAVE_BSOUNDRECORDER
 #include <SoundRecorder.h>
 using namespace BPrivate::Media::Experimental;
 #endif
@@ -63,7 +63,7 @@ typedef struct {
     sem_id output_sem;
     int output_index;
     BSoundPlayer *player;
-#ifdef HAVE_BSOUNDRECORDER
+#if HAVE_BSOUNDRECORDER
     BSoundRecorder *recorder;
 #endif
     int has_quit; /* signal callbacks not to wait */
@@ -150,7 +150,7 @@ static void audioplay_callback(void *cookie, void *buffer, size_t bufferSize, co
     }
 }
 
-#ifdef HAVE_BSOUNDRECORDER
+#if HAVE_BSOUNDRECORDER
 /* called back by BSoundRecorder */
 static void audiorecord_callback(void *cookie, bigtime_t timestamp, void *buffer, size_t bufferSize, const media_multi_audio_format &format)
 {
@@ -192,7 +192,7 @@ static int audio_open(AudioData *s, int is_output, const char *audio_device)
     media_raw_audio_format format;
     media_multi_audio_format iformat;
 
-#ifndef HAVE_BSOUNDRECORDER
+#if !HAVE_BSOUNDRECORDER
     if (!is_output)
         return AVERROR(EIO); /* not for now */
 #endif
@@ -210,7 +210,7 @@ static int audio_open(AudioData *s, int is_output, const char *audio_device)
     s->frame_size = AUDIO_BLOCK_SIZE;
     /* bump up the priority (avoid realtime though) */
     set_thread_priority(find_thread(NULL), B_DISPLAY_PRIORITY+1);
-#ifdef HAVE_BSOUNDRECORDER
+#if HAVE_BSOUNDRECORDER
     if (!is_output) {
         bool wait_for_input = false;
         if (audio_device && !strcmp(audio_device, "wait:"))
@@ -273,7 +273,7 @@ static int audio_close(AudioData *s)
     }
     if (s->player)
         delete s->player;
-#ifdef HAVE_BSOUNDRECORDER
+#if HAVE_BSOUNDRECORDER
     if (s->recorder)
         delete s->recorder;
 #endif
diff --git a/libavdevice/bktr.c b/libavdevice/bktr.c
index ea9a6e25e1..86590d0891 100644
--- a/libavdevice/bktr.c
+++ b/libavdevice/bktr.c
@@ -26,13 +26,13 @@
 
 #define _BSD_SOURCE 1
 #include "libavformat/avformat.h"
-#if defined (HAVE_DEV_BKTR_IOCTL_METEOR_H) && defined (HAVE_DEV_BKTR_IOCTL_BT848_H)
+#if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
 # include <dev/bktr/ioctl_meteor.h>
 # include <dev/bktr/ioctl_bt848.h>
-#elif defined (HAVE_MACHINE_IOCTL_METEOR_H) && defined (HAVE_MACHINE_IOCTL_BT848_H)
+#elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
 # include <machine/ioctl_meteor.h>
 # include <machine/ioctl_bt848.h>
-#elif defined (HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H) && defined (HAVE_DEV_VIDEO_METEOR_IOCTL_BT848_H)
+#elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_METEOR_IOCTL_BT848_H
 # include <dev/video/meteor/ioctl_meteor.h>
 # include <dev/video/bktr/ioctl_bt848.h>
 #elif HAVE_DEV_IC_BT8XX_H
diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 1efed83f3b..e6e142a807 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -35,7 +35,7 @@
 #include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <sys/time.h>
-#ifdef HAVE_SYS_VIDEOIO_H
+#if HAVE_SYS_VIDEOIO_H
 #include <sys/videoio.h>
 #else
 #include <asm/types.h>
diff --git a/libavformat/aiff.c b/libavformat/aiff.c
index 8bd69c200e..70569ed5a9 100644
--- a/libavformat/aiff.c
+++ b/libavformat/aiff.c
@@ -170,7 +170,7 @@ static unsigned int get_aiff_header(ByteIOContext *pb, AVCodecContext *codec,
     return num_frames;
 }
 
-#ifdef CONFIG_AIFF_MUXER
+#if CONFIG_AIFF_MUXER
 typedef struct {
     int64_t form;
     int64_t frames;
@@ -439,7 +439,7 @@ static int aiff_read_packet(AVFormatContext *s,
     return 0;
 }
 
-#ifdef CONFIG_AIFF_DEMUXER
+#if CONFIG_AIFF_DEMUXER
 AVInputFormat aiff_demuxer = {
     "aiff",
     NULL_IF_CONFIG_SMALL("Audio IFF"),
@@ -453,7 +453,7 @@ AVInputFormat aiff_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_AIFF_MUXER
+#if CONFIG_AIFF_MUXER
 AVOutputFormat aiff_muxer = {
     "aiff",
     NULL_IF_CONFIG_SMALL("Audio IFF"),
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 43243f8062..387189a178 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -168,7 +168,7 @@ void av_register_all(void)
     REGISTER_MUXER    (RTP, rtp);
     REGISTER_DEMUXER  (RTSP, rtsp);
     REGISTER_DEMUXER  (SDP, sdp);
-#ifdef CONFIG_SDP_DEMUXER
+#if CONFIG_SDP_DEMUXER
     av_register_rtp_dynamic_payload_handlers();
     av_register_rdt_dynamic_payload_handlers();
 #endif
diff --git a/libavformat/amr.c b/libavformat/amr.c
index 1f623512dc..cbc4ec50d4 100644
--- a/libavformat/amr.c
+++ b/libavformat/amr.c
@@ -30,7 +30,7 @@ Only mono files are supported.
 static const char AMR_header [] = "#!AMR\n";
 static const char AMRWB_header [] = "#!AMR-WB\n";
 
-#ifdef CONFIG_AMR_MUXER
+#if CONFIG_AMR_MUXER
 static int amr_write_header(AVFormatContext *s)
 {
     ByteIOContext *pb = s->pb;
@@ -166,7 +166,7 @@ static int amr_read_packet(AVFormatContext *s,
     return 0;
 }
 
-#ifdef CONFIG_AMR_DEMUXER
+#if CONFIG_AMR_DEMUXER
 AVInputFormat amr_demuxer = {
     "amr",
     NULL_IF_CONFIG_SMALL("3GPP AMR file format"),
@@ -178,7 +178,7 @@ AVInputFormat amr_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_AMR_MUXER
+#if CONFIG_AMR_MUXER
 AVOutputFormat amr_muxer = {
     "amr",
     NULL_IF_CONFIG_SMALL("3GPP AMR file format"),
diff --git a/libavformat/asf-enc.c b/libavformat/asf-enc.c
index e1f3c1b6d9..94d208ffa6 100644
--- a/libavformat/asf-enc.c
+++ b/libavformat/asf-enc.c
@@ -812,14 +812,14 @@ static int asf_write_trailer(AVFormatContext *s)
     return 0;
 }
 
-#ifdef CONFIG_ASF_MUXER
+#if CONFIG_ASF_MUXER
 AVOutputFormat asf_muxer = {
     "asf",
     NULL_IF_CONFIG_SMALL("ASF format"),
     "video/x-ms-asf",
     "asf,wmv,wma",
     sizeof(ASFContext),
-#ifdef CONFIG_LIBMP3LAME
+#if CONFIG_LIBMP3LAME
     CODEC_ID_MP3,
 #else
     CODEC_ID_MP2,
@@ -833,14 +833,14 @@ AVOutputFormat asf_muxer = {
 };
 #endif
 
-#ifdef CONFIG_ASF_STREAM_MUXER
+#if CONFIG_ASF_STREAM_MUXER
 AVOutputFormat asf_stream_muxer = {
     "asf_stream",
     NULL_IF_CONFIG_SMALL("ASF format"),
     "video/x-ms-asf",
     "asf,wmv,wma",
     sizeof(ASFContext),
-#ifdef CONFIG_LIBMP3LAME
+#if CONFIG_LIBMP3LAME
     CODEC_ID_MP3,
 #else
     CODEC_ID_MP2,
diff --git a/libavformat/au.c b/libavformat/au.c
index 7d151cf1d6..caa7f4dff3 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -47,7 +47,7 @@ static const AVCodecTag codec_au_tags[] = {
     { 0, 0 },
 };
 
-#ifdef CONFIG_AU_MUXER
+#if CONFIG_AU_MUXER
 /* AUDIO_FILE header */
 static int put_au_header(ByteIOContext *pb, AVCodecContext *enc)
 {
@@ -177,7 +177,7 @@ static int au_read_packet(AVFormatContext *s,
     return 0;
 }
 
-#ifdef CONFIG_AU_DEMUXER
+#if CONFIG_AU_DEMUXER
 AVInputFormat au_demuxer = {
     "au",
     NULL_IF_CONFIG_SMALL("SUN AU format"),
@@ -191,7 +191,7 @@ AVInputFormat au_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_AU_MUXER
+#if CONFIG_AU_MUXER
 AVOutputFormat au_muxer = {
     "au",
     NULL_IF_CONFIG_SMALL("SUN AU format"),
diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index cea513f9c8..6267c77b20 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -27,7 +27,7 @@
  *  - fill all fields if non streamed (nb_frames for example)
  */
 
-#ifdef CONFIG_AVI_MUXER
+#if CONFIG_AVI_MUXER
 typedef struct AVIIentry {
     unsigned int flags, pos, len;
 } AVIIentry;
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index d1dc09ba0f..aa6ad87dec 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -160,12 +160,12 @@ int64_t url_fseek(ByteIOContext *s, int64_t offset, int whence)
     } else {
         int64_t res = AVERROR(EPIPE);
 
-#if defined(CONFIG_MUXERS) || defined(CONFIG_NETWORK)
+#if CONFIG_MUXERS || CONFIG_NETWORK
         if (s->write_flag) {
             flush_buffer(s);
             s->must_flush = 1;
         }
-#endif /* defined(CONFIG_MUXERS) || defined(CONFIG_NETWORK) */
+#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
         if (!s->seek || (res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
             return res;
         if (!s->write_flag)
@@ -624,7 +624,7 @@ URLContext *url_fileno(ByteIOContext *s)
     return s->opaque;
 }
 
-#ifdef CONFIG_MUXERS
+#if CONFIG_MUXERS
 int url_fprintf(ByteIOContext *s, const char *fmt, ...)
 {
     va_list ap;
@@ -688,8 +688,8 @@ int64_t av_url_read_fseek(ByteIOContext *s, int stream_index,
 }
 
 /* url_open_dyn_buf and url_close_dyn_buf are used in rtp.c to send a response
- * back to the server even if CONFIG_MUXERS is not set. */
-#if defined(CONFIG_MUXERS) || defined(CONFIG_NETWORK)
+ * back to the server even if CONFIG_MUXERS is false. */
+#if CONFIG_MUXERS || CONFIG_NETWORK
 /* buffer handling */
 int url_open_buf(ByteIOContext **s, uint8_t *buf, int buf_size, int flags)
 {
diff --git a/libavformat/daud.c b/libavformat/daud.c
index 2bca9478ea..cdd831ba4b 100644
--- a/libavformat/daud.c
+++ b/libavformat/daud.c
@@ -78,7 +78,7 @@ AVInputFormat daud_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_DAUD_MUXER
+#if CONFIG_DAUD_MUXER
 AVOutputFormat daud_muxer =
 {
     "daud",
diff --git a/libavformat/dv.c b/libavformat/dv.c
index a0e07e91ca..eb02e3bc4b 100644
--- a/libavformat/dv.c
+++ b/libavformat/dv.c
@@ -462,7 +462,7 @@ static int dv_read_close(AVFormatContext *s)
     return 0;
 }
 
-#ifdef CONFIG_DV_DEMUXER
+#if CONFIG_DV_DEMUXER
 AVInputFormat dv_demuxer = {
     "dv",
     NULL_IF_CONFIG_SMALL("DV video format"),
diff --git a/libavformat/dvenc.c b/libavformat/dvenc.c
index c8dc5a8301..428d4a0656 100644
--- a/libavformat/dvenc.c
+++ b/libavformat/dvenc.c
@@ -359,7 +359,7 @@ void dv_delete_mux(DVMuxContext *c)
         av_fifo_free(&c->audio_data[i]);
 }
 
-#ifdef CONFIG_DV_MUXER
+#if CONFIG_DV_MUXER
 static int dv_write_header(AVFormatContext *s)
 {
     if (!dv_init_mux(s)) {
diff --git a/libavformat/ffmdec.c b/libavformat/ffmdec.c
index fd859552d3..e5d98f11f8 100644
--- a/libavformat/ffmdec.c
+++ b/libavformat/ffmdec.c
@@ -22,7 +22,7 @@
 #include "libavutil/intreadwrite.h"
 #include "avformat.h"
 #include "ffm.h"
-#ifdef CONFIG_FFSERVER
+#if CONFIG_FFSERVER
 #include <unistd.h>
 
 int64_t ffm_read_write_index(int fd)
diff --git a/libavformat/file.c b/libavformat/file.c
index 827541d1ae..88ac4db8d4 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -22,7 +22,7 @@
 #include "libavutil/avstring.h"
 #include "avformat.h"
 #include <fcntl.h>
-#ifdef HAVE_SETMODE
+#if HAVE_SETMODE
 #include <io.h>
 #endif
 #include <unistd.h>
@@ -107,7 +107,7 @@ static int pipe_open(URLContext *h, const char *filename, int flags)
             fd = 0;
         }
     }
-#ifdef HAVE_SETMODE
+#if HAVE_SETMODE
     setmode(fd, O_BINARY);
 #endif
     h->priv_data = (void *)(size_t)fd;
diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
index 6e3a3e4f82..27f96217c4 100644
--- a/libavformat/flvenc.c
+++ b/libavformat/flvenc.c
@@ -382,7 +382,7 @@ AVOutputFormat flv_muxer = {
     "video/x-flv",
     "flv",
     sizeof(FLVContext),
-#ifdef CONFIG_LIBMP3LAME
+#if CONFIG_LIBMP3LAME
     CODEC_ID_MP3,
 #else // CONFIG_LIBMP3LAME
     CODEC_ID_ADPCM_SWF,
diff --git a/libavformat/framehook.c b/libavformat/framehook.c
index 90815fb1d6..8dba5bc85c 100644
--- a/libavformat/framehook.c
+++ b/libavformat/framehook.c
@@ -23,7 +23,7 @@
 #include "avformat.h"
 #include "framehook.h"
 
-#ifdef HAVE_DLFCN_H
+#if HAVE_DLFCN_H
 #include <dlfcn.h>
 #endif
 
diff --git a/libavformat/img2.c b/libavformat/img2.c
index c0b5de2144..244b050802 100644
--- a/libavformat/img2.c
+++ b/libavformat/img2.c
@@ -305,7 +305,7 @@ static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
     }
 }
 
-#if defined(CONFIG_IMAGE2_MUXER) || defined(CONFIG_IMAGE2PIPE_MUXER)
+#if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
 /******************************************************/
 /* image output */
 
@@ -370,10 +370,10 @@ static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
     return 0;
 }
 
-#endif /* defined(CONFIG_IMAGE2_MUXER) || defined(CONFIG_IMAGE2PIPE_MUXER) */
+#endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
 
 /* input */
-#ifdef CONFIG_IMAGE2_DEMUXER
+#if CONFIG_IMAGE2_DEMUXER
 AVInputFormat image2_demuxer = {
     "image2",
     NULL_IF_CONFIG_SMALL("image2 sequence"),
@@ -387,7 +387,7 @@ AVInputFormat image2_demuxer = {
     AVFMT_NOFILE,
 };
 #endif
-#ifdef CONFIG_IMAGE2PIPE_DEMUXER
+#if CONFIG_IMAGE2PIPE_DEMUXER
 AVInputFormat image2pipe_demuxer = {
     "image2pipe",
     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
@@ -399,7 +399,7 @@ AVInputFormat image2pipe_demuxer = {
 #endif
 
 /* output */
-#ifdef CONFIG_IMAGE2_MUXER
+#if CONFIG_IMAGE2_MUXER
 AVOutputFormat image2_muxer = {
     "image2",
     NULL_IF_CONFIG_SMALL("image2 sequence"),
@@ -414,7 +414,7 @@ AVOutputFormat image2_muxer = {
     .flags= AVFMT_NOTIMESTAMPS | AVFMT_NOFILE
 };
 #endif
-#ifdef CONFIG_IMAGE2PIPE_MUXER
+#if CONFIG_IMAGE2PIPE_MUXER
 AVOutputFormat image2pipe_muxer = {
     "image2pipe",
     NULL_IF_CONFIG_SMALL("piped image2 sequence"),
diff --git a/libavformat/libnut.c b/libavformat/libnut.c
index 3f4a69b2fb..a088551816 100644
--- a/libavformat/libnut.c
+++ b/libavformat/libnut.c
@@ -44,7 +44,7 @@ static const AVCodecTag nut_tags[] = {
     { 0, 0 },
 };
 
-#ifdef CONFIG_LIBNUT_MUXER
+#if CONFIG_LIBNUT_MUXER
 static int av_write(void * h, size_t len, const uint8_t * buf) {
     ByteIOContext * bc = h;
     put_buffer(bc, buf, len);
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 710214284b..e23d03b897 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -39,10 +39,10 @@
 #include "libavutil/intreadwrite.h"
 #include "libavutil/avstring.h"
 #include "libavutil/lzo.h"
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
 #include <zlib.h>
 #endif
-#ifdef CONFIG_BZLIB
+#if CONFIG_BZLIB
 #include <bzlib.h>
 #endif
 
@@ -879,7 +879,7 @@ static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
             goto failed;
         pkt_size -= olen;
         break;
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
         z_stream zstream = {0};
         if (inflateInit(&zstream) != Z_OK)
@@ -900,7 +900,7 @@ static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
         break;
     }
 #endif
-#ifdef CONFIG_BZLIB
+#if CONFIG_BZLIB
     case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
         bz_stream bzstream = {0};
         if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
@@ -1147,10 +1147,10 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
         } else if (encodings_list->nb_elem == 1) {
             if (encodings[0].type ||
                 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
                  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
 #endif
-#ifdef CONFIG_BZLIB
+#if CONFIG_BZLIB
                  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
 #endif
                  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
diff --git a/libavformat/mmf.c b/libavformat/mmf.c
index 5e6d4ebccb..7c2f4bf223 100644
--- a/libavformat/mmf.c
+++ b/libavformat/mmf.c
@@ -36,7 +36,7 @@ static int mmf_rate(int code)
     return mmf_rates[code];
 }
 
-#ifdef CONFIG_MMF_MUXER
+#if CONFIG_MMF_MUXER
 static int mmf_rate_code(int rate)
 {
     int i;
@@ -290,7 +290,7 @@ static int mmf_read_packet(AVFormatContext *s,
     return ret;
 }
 
-#ifdef CONFIG_MMF_DEMUXER
+#if CONFIG_MMF_DEMUXER
 AVInputFormat mmf_demuxer = {
     "mmf",
     NULL_IF_CONFIG_SMALL("mmf format"),
@@ -302,7 +302,7 @@ AVInputFormat mmf_demuxer = {
     pcm_read_seek,
 };
 #endif
-#ifdef CONFIG_MMF_MUXER
+#if CONFIG_MMF_MUXER
 AVOutputFormat mmf_muxer = {
     "mmf",
     NULL_IF_CONFIG_SMALL("mmf format"),
diff --git a/libavformat/mov.c b/libavformat/mov.c
index c842057b66..5638d34f80 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -31,7 +31,7 @@
 #include "libavcodec/mpeg4audio.h"
 #include "libavcodec/mpegaudiodata.h"
 
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
 #include <zlib.h>
 #endif
 
@@ -1005,7 +1005,7 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 
     /* special codec parameters handling */
     switch (st->codec->codec_id) {
-#ifdef CONFIG_DV_DEMUXER
+#if CONFIG_DV_DEMUXER
     case CODEC_ID_DVAUDIO:
         c->dv_fctx = av_alloc_format_context();
         c->dv_demux = dv_init_demux(c->dv_fctx);
@@ -1380,13 +1380,13 @@ static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
         sc->pb = c->fc->pb;
 
     switch (st->codec->codec_id) {
-#ifdef CONFIG_H261_DECODER
+#if CONFIG_H261_DECODER
     case CODEC_ID_H261:
 #endif
-#ifdef CONFIG_H263_DECODER
+#if CONFIG_H263_DECODER
     case CODEC_ID_H263:
 #endif
-#ifdef CONFIG_MPEG4_DECODER
+#if CONFIG_MPEG4_DECODER
     case CODEC_ID_MPEG4:
 #endif
         st->codec->width= 0; /* let decoder init width/height */
@@ -1691,7 +1691,7 @@ static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 
 static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
 {
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
     ByteIOContext ctx;
     uint8_t *cmov_data;
     uint8_t *moov_data; /* uncompressed data */
@@ -1939,7 +1939,7 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
         return -1;
     }
     av_get_packet(sc->pb, pkt, sample->size);
-#ifdef CONFIG_DV_DEMUXER
+#if CONFIG_DV_DEMUXER
     if (mov->dv_demux && sc->dv_audio_container) {
         dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
         av_free(pkt->data);
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 16e8fce1ae..7127cc4401 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -1819,7 +1819,7 @@ static int mov_write_trailer(AVFormatContext *s)
     return res;
 }
 
-#ifdef CONFIG_MOV_MUXER
+#if CONFIG_MOV_MUXER
 AVOutputFormat mov_muxer = {
     "mov",
     NULL_IF_CONFIG_SMALL("MOV format"),
@@ -1835,7 +1835,7 @@ AVOutputFormat mov_muxer = {
     .codec_tag = (const AVCodecTag* const []){codec_movvideo_tags, codec_movaudio_tags, 0},
 };
 #endif
-#ifdef CONFIG_TGP_MUXER
+#if CONFIG_TGP_MUXER
 AVOutputFormat tgp_muxer = {
     "3gp",
     NULL_IF_CONFIG_SMALL("3GP format"),
@@ -1851,7 +1851,7 @@ AVOutputFormat tgp_muxer = {
     .codec_tag = (const AVCodecTag* const []){codec_3gp_tags, 0},
 };
 #endif
-#ifdef CONFIG_MP4_MUXER
+#if CONFIG_MP4_MUXER
 AVOutputFormat mp4_muxer = {
     "mp4",
     NULL_IF_CONFIG_SMALL("MP4 format"),
@@ -1867,7 +1867,7 @@ AVOutputFormat mp4_muxer = {
     .codec_tag = (const AVCodecTag* const []){ff_mp4_obj_type, 0},
 };
 #endif
-#ifdef CONFIG_PSP_MUXER
+#if CONFIG_PSP_MUXER
 AVOutputFormat psp_muxer = {
     "psp",
     NULL_IF_CONFIG_SMALL("PSP MP4 format"),
@@ -1883,7 +1883,7 @@ AVOutputFormat psp_muxer = {
     .codec_tag = (const AVCodecTag* const []){ff_mp4_obj_type, 0},
 };
 #endif
-#ifdef CONFIG_TG2_MUXER
+#if CONFIG_TG2_MUXER
 AVOutputFormat tg2_muxer = {
     "3g2",
     NULL_IF_CONFIG_SMALL("3GP2 format"),
@@ -1899,7 +1899,7 @@ AVOutputFormat tg2_muxer = {
     .codec_tag = (const AVCodecTag* const []){codec_3gp_tags, 0},
 };
 #endif
-#ifdef CONFIG_IPOD_MUXER
+#if CONFIG_IPOD_MUXER
 AVOutputFormat ipod_muxer = {
     "ipod",
     NULL_IF_CONFIG_SMALL("iPod H.264 MP4 format"),
diff --git a/libavformat/mp3.c b/libavformat/mp3.c
index a4eb49c5e7..0b1a167002 100644
--- a/libavformat/mp3.c
+++ b/libavformat/mp3.c
@@ -527,7 +527,7 @@ static int mp3_read_packet(AVFormatContext *s, AVPacket *pkt)
     return ret;
 }
 
-#if defined(CONFIG_MP2_MUXER) || defined(CONFIG_MP3_MUXER)
+#if CONFIG_MP2_MUXER || CONFIG_MP3_MUXER
 static void id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
 {
     int v, i;
@@ -645,9 +645,9 @@ static int mp3_write_trailer(struct AVFormatContext *s)
     }
     return 0;
 }
-#endif /* defined(CONFIG_MP2_MUXER) || defined(CONFIG_MP3_MUXER) */
+#endif /* CONFIG_MP2_MUXER || CONFIG_MP3_MUXER */
 
-#ifdef CONFIG_MP3_DEMUXER
+#if CONFIG_MP3_DEMUXER
 AVInputFormat mp3_demuxer = {
     "mp3",
     NULL_IF_CONFIG_SMALL("MPEG audio"),
@@ -659,12 +659,12 @@ AVInputFormat mp3_demuxer = {
     .extensions = "mp2,mp3,m2a", /* XXX: use probe */
 };
 #endif
-#ifdef CONFIG_MP2_MUXER
+#if CONFIG_MP2_MUXER
 AVOutputFormat mp2_muxer = {
     "mp2",
     NULL_IF_CONFIG_SMALL("MPEG audio layer 2"),
     "audio/x-mpeg",
-#ifdef CONFIG_LIBMP3LAME
+#if CONFIG_LIBMP3LAME
     "mp2,m2a",
 #else
     "mp2,mp3,m2a",
@@ -677,7 +677,7 @@ AVOutputFormat mp2_muxer = {
     mp3_write_trailer,
 };
 #endif
-#ifdef CONFIG_MP3_MUXER
+#if CONFIG_MP3_MUXER
 AVOutputFormat mp3_muxer = {
     "mp3",
     NULL_IF_CONFIG_SMALL("MPEG audio layer 3"),
diff --git a/libavformat/mpegenc.c b/libavformat/mpegenc.c
index 4b86f20dff..e4fe6ca940 100644
--- a/libavformat/mpegenc.c
+++ b/libavformat/mpegenc.c
@@ -1219,7 +1219,7 @@ static int mpeg_mux_end(AVFormatContext *ctx)
     return 0;
 }
 
-#ifdef CONFIG_MPEG1SYSTEM_MUXER
+#if CONFIG_MPEG1SYSTEM_MUXER
 AVOutputFormat mpeg1system_muxer = {
     "mpeg",
     NULL_IF_CONFIG_SMALL("MPEG-1 System format"),
@@ -1233,7 +1233,7 @@ AVOutputFormat mpeg1system_muxer = {
     mpeg_mux_end,
 };
 #endif
-#ifdef CONFIG_MPEG1VCD_MUXER
+#if CONFIG_MPEG1VCD_MUXER
 AVOutputFormat mpeg1vcd_muxer = {
     "vcd",
     NULL_IF_CONFIG_SMALL("MPEG-1 System format (VCD)"),
@@ -1247,7 +1247,7 @@ AVOutputFormat mpeg1vcd_muxer = {
     mpeg_mux_end,
 };
 #endif
-#ifdef CONFIG_MPEG2VOB_MUXER
+#if CONFIG_MPEG2VOB_MUXER
 AVOutputFormat mpeg2vob_muxer = {
     "vob",
     NULL_IF_CONFIG_SMALL("MPEG-2 PS format (VOB)"),
@@ -1263,7 +1263,7 @@ AVOutputFormat mpeg2vob_muxer = {
 #endif
 
 /* Same as mpeg2vob_mux except that the pack size is 2324 */
-#ifdef CONFIG_MPEG2SVCD_MUXER
+#if CONFIG_MPEG2SVCD_MUXER
 AVOutputFormat mpeg2svcd_muxer = {
     "svcd",
     NULL_IF_CONFIG_SMALL("MPEG-2 PS format (VOB)"),
@@ -1279,7 +1279,7 @@ AVOutputFormat mpeg2svcd_muxer = {
 #endif
 
 /*  Same as mpeg2vob_mux except the 'is_dvd' flag is set to produce NAV pkts */
-#ifdef CONFIG_MPEG2DVD_MUXER
+#if CONFIG_MPEG2DVD_MUXER
 AVOutputFormat mpeg2dvd_muxer = {
     "dvd",
     NULL_IF_CONFIG_SMALL("MPEG-2 PS format (DVD VOB)"),
diff --git a/libavformat/network.h b/libavformat/network.h
index a5904d93af..ef08b557e9 100644
--- a/libavformat/network.h
+++ b/libavformat/network.h
@@ -21,7 +21,7 @@
 #ifndef AVFORMAT_NETWORK_H
 #define AVFORMAT_NETWORK_H
 
-#ifdef HAVE_WINSOCK2_H
+#if HAVE_WINSOCK2_H
 #include <winsock2.h>
 #include <ws2tcpip.h>
 
@@ -38,7 +38,7 @@
 #define FF_NETERROR(err) err
 #endif
 
-#ifdef HAVE_ARPA_INET_H
+#if HAVE_ARPA_INET_H
 #include <arpa/inet.h>
 #endif
 
@@ -46,7 +46,7 @@ int ff_socket_nonblock(int socket, int enable);
 
 static inline int ff_network_init(void)
 {
-#ifdef HAVE_WINSOCK2_H
+#if HAVE_WINSOCK2_H
     WSADATA wsaData;
     if (WSAStartup(MAKEWORD(1,1), &wsaData))
         return 0;
@@ -56,12 +56,12 @@ static inline int ff_network_init(void)
 
 static inline void ff_network_close(void)
 {
-#ifdef HAVE_WINSOCK2_H
+#if HAVE_WINSOCK2_H
     WSACleanup();
 #endif
 }
 
-#if !defined(HAVE_INET_ATON)
+#if !HAVE_INET_ATON
 /* in os_support.c */
 int inet_aton (const char * str, struct in_addr * add);
 #endif
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 5bcc44df2c..4d838a5e95 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -906,7 +906,7 @@ static int nut_read_close(AVFormatContext *s)
     return 0;
 }
 
-#ifdef CONFIG_NUT_DEMUXER
+#if CONFIG_NUT_DEMUXER
 AVInputFormat nut_demuxer = {
     "nut",
     NULL_IF_CONFIG_SMALL("NUT format"),
diff --git a/libavformat/nutenc.c b/libavformat/nutenc.c
index edcb2c7219..1e5f733194 100644
--- a/libavformat/nutenc.c
+++ b/libavformat/nutenc.c
@@ -809,9 +809,9 @@ AVOutputFormat nut_muxer = {
     "video/x-nut",
     "nut",
     sizeof(NUTContext),
-#ifdef CONFIG_LIBVORBIS
+#if   CONFIG_LIBVORBIS
     CODEC_ID_VORBIS,
-#elif defined(CONFIG_LIBMP3LAME)
+#elif CONFIG_LIBMP3LAME
     CODEC_ID_MP3,
 #else
     CODEC_ID_MP2,
diff --git a/libavformat/os_support.c b/libavformat/os_support.c
index e6dbc307dd..6763e39cf9 100644
--- a/libavformat/os_support.c
+++ b/libavformat/os_support.c
@@ -30,18 +30,18 @@
 #include <sys/time.h>
 #include "os_support.h"
 
-#ifdef CONFIG_NETWORK
-#ifndef HAVE_POLL_H
-#ifdef HAVE_WINSOCK2_H
+#if CONFIG_NETWORK
+#if !HAVE_POLL_H
+#if HAVE_WINSOCK2_H
 #include <winsock2.h>
-#elif defined (HAVE_SYS_SELECT_H)
+#elif HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #endif
 
 #include "network.h"
 
-#if !defined(HAVE_INET_ATON)
+#if !HAVE_INET_ATON
 #include <stdlib.h>
 #include <strings.h>
 
@@ -58,7 +58,7 @@ int inet_aton (const char * str, struct in_addr * add)
 
     return 1;
 }
-#endif /* !defined(HAVE_INET_ATON) */
+#endif /* !HAVE_INET_ATON */
 
 /* resolve host with also IP address parsing */
 int resolve_host(struct in_addr *sin_addr, const char *hostname)
@@ -76,7 +76,7 @@ int resolve_host(struct in_addr *sin_addr, const char *hostname)
 
 int ff_socket_nonblock(int socket, int enable)
 {
-#ifdef HAVE_WINSOCK2_H
+#if HAVE_WINSOCK2_H
    return ioctlsocket(socket, FIONBIO, &enable);
 #else
    if (enable)
@@ -87,8 +87,8 @@ int ff_socket_nonblock(int socket, int enable)
 }
 #endif /* CONFIG_NETWORK */
 
-#ifdef CONFIG_FFSERVER
-#ifndef HAVE_POLL_H
+#if CONFIG_FFSERVER
+#if !HAVE_POLL_H
 int poll(struct pollfd *fds, nfds_t numfds, int timeout)
 {
     fd_set read_set;
@@ -98,7 +98,7 @@ int poll(struct pollfd *fds, nfds_t numfds, int timeout)
     int n;
     int rc;
 
-#ifdef HAVE_WINSOCK2_H
+#if HAVE_WINSOCK2_H
     if (numfds >= FD_SETSIZE) {
         errno = EINVAL;
         return -1;
@@ -113,7 +113,7 @@ int poll(struct pollfd *fds, nfds_t numfds, int timeout)
     for(i = 0; i < numfds; i++) {
         if (fds[i].fd < 0)
             continue;
-#ifndef HAVE_WINSOCK2_H
+#if !HAVE_WINSOCK2_H
         if (fds[i].fd >= FD_SETSIZE) {
             errno = EINVAL;
             return -1;
diff --git a/libavformat/os_support.h b/libavformat/os_support.h
index 0b6a292d6d..165dc23a06 100644
--- a/libavformat/os_support.h
+++ b/libavformat/os_support.h
@@ -34,7 +34,7 @@
 
 static inline int is_dos_path(const char *path)
 {
-#ifdef HAVE_DOS_PATHS
+#if HAVE_DOS_PATHS
     if (path[0] && path[1] == ':')
         return 1;
 #endif
@@ -58,18 +58,18 @@ static inline int is_dos_path(const char *path)
 #  endif
 #endif
 
-#ifdef CONFIG_NETWORK
-#ifndef HAVE_SOCKLEN_T
+#if CONFIG_NETWORK
+#if !HAVE_SOCKLEN_T
 typedef int socklen_t;
 #endif
 
 /* most of the time closing a socket is just closing an fd */
-#ifndef HAVE_CLOSESOCKET
+#if !HAVE_CLOSESOCKET
 #define closesocket close
 #endif
 
-#ifdef CONFIG_FFSERVER
-#ifndef HAVE_POLL_H
+#if CONFIG_FFSERVER
+#if !HAVE_POLL_H
 typedef unsigned long nfds_t;
 
 struct pollfd {
diff --git a/libavformat/raw.c b/libavformat/raw.c
index b93cdccd1c..f3214ac01c 100644
--- a/libavformat/raw.c
+++ b/libavformat/raw.c
@@ -28,7 +28,7 @@
 #include "raw.h"
 
 /* simple formats */
-#ifdef CONFIG_FLAC_MUXER
+#if CONFIG_FLAC_MUXER
 static int flac_write_header(struct AVFormatContext *s)
 {
     static const uint8_t header[8] = {
@@ -61,7 +61,7 @@ static int flac_write_trailer(struct AVFormatContext *s)
 }
 #endif
 
-#ifdef CONFIG_ROQ_MUXER
+#if CONFIG_ROQ_MUXER
 static int roq_write_header(struct AVFormatContext *s)
 {
     static const uint8_t header[] = {
@@ -75,14 +75,14 @@ static int roq_write_header(struct AVFormatContext *s)
 }
 #endif
 
-#ifdef CONFIG_NULL_MUXER
+#if CONFIG_NULL_MUXER
 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
     return 0;
 }
 #endif
 
-#ifdef CONFIG_MUXERS
+#if CONFIG_MUXERS
 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
     put_buffer(s->pb, pkt->data, pkt->size);
@@ -91,7 +91,7 @@ static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 }
 #endif
 
-#ifdef CONFIG_DEMUXERS
+#if CONFIG_DEMUXERS
 /* raw input */
 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
 {
@@ -182,7 +182,7 @@ static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
 }
 #endif
 
-#ifdef CONFIG_RAWVIDEO_DEMUXER
+#if CONFIG_RAWVIDEO_DEMUXER
 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
     int packet_size, ret, width, height;
@@ -208,7 +208,7 @@ static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
 }
 #endif
 
-#ifdef CONFIG_INGENIENT_DEMUXER
+#if CONFIG_INGENIENT_DEMUXER
 // http://www.artificis.hu/files/texts/ingenient.txt
 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
@@ -246,7 +246,7 @@ static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
 }
 #endif
 
-#ifdef CONFIG_DEMUXERS
+#if CONFIG_DEMUXERS
 int pcm_read_seek(AVFormatContext *s,
                   int stream_index, int64_t timestamp, int flags)
 {
@@ -320,7 +320,7 @@ static int video_read_header(AVFormatContext *s,
 }
 #endif
 
-#ifdef CONFIG_MPEGVIDEO_DEMUXER
+#if CONFIG_MPEGVIDEO_DEMUXER
 #define SEQ_START_CODE          0x000001b3
 #define GOP_START_CODE          0x000001b8
 #define PICTURE_START_CODE      0x00000100
@@ -354,7 +354,7 @@ static int mpegvideo_probe(AVProbeData *p)
 }
 #endif
 
-#ifdef CONFIG_M4V_DEMUXER
+#if CONFIG_M4V_DEMUXER
 #define VISUAL_OBJECT_START_CODE       0x000001b5
 #define VOP_START_CODE                 0x000001b6
 
@@ -383,7 +383,7 @@ static int mpeg4video_probe(AVProbeData *probe_packet)
 }
 #endif
 
-#ifdef CONFIG_H264_DEMUXER
+#if CONFIG_H264_DEMUXER
 static int h264_probe(AVProbeData *p)
 {
     uint32_t code= -1;
@@ -430,7 +430,7 @@ static int h264_probe(AVProbeData *p)
 }
 #endif
 
-#ifdef CONFIG_H263_DEMUXER
+#if CONFIG_H263_DEMUXER
 static int h263_probe(AVProbeData *p)
 {
     int code;
@@ -445,7 +445,7 @@ static int h263_probe(AVProbeData *p)
 }
 #endif
 
-#ifdef CONFIG_H261_DEMUXER
+#if CONFIG_H261_DEMUXER
 static int h261_probe(AVProbeData *p)
 {
     int code;
@@ -460,7 +460,7 @@ static int h261_probe(AVProbeData *p)
 }
 #endif
 
-#ifdef CONFIG_DTS_DEMUXER
+#if CONFIG_DTS_DEMUXER
 #define DCA_MARKER_14B_BE 0x1FFFE800
 #define DCA_MARKER_14B_LE 0xFF1F00E8
 #define DCA_MARKER_RAW_BE 0x7FFE8001
@@ -495,7 +495,7 @@ static int dts_probe(AVProbeData *p)
 }
 #endif
 
-#ifdef CONFIG_DIRAC_DEMUXER
+#if CONFIG_DIRAC_DEMUXER
 static int dirac_probe(AVProbeData *p)
 {
     if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))
@@ -505,7 +505,7 @@ static int dirac_probe(AVProbeData *p)
 }
 #endif
 
-#ifdef CONFIG_DNXHD_DEMUXER
+#if CONFIG_DNXHD_DEMUXER
 static int dnxhd_probe(AVProbeData *p)
 {
     static const uint8_t header[] = {0x00,0x00,0x02,0x80,0x01};
@@ -516,7 +516,7 @@ static int dnxhd_probe(AVProbeData *p)
 }
 #endif
 
-#if defined(CONFIG_AC3_DEMUXER) || defined(CONFIG_EAC3_DEMUXER)
+#if CONFIG_AC3_DEMUXER || CONFIG_EAC3_DEMUXER
 static int ac3_eac3_probe(AVProbeData *p, enum CodecID expected_codec_id)
 {
     int max_frames, first_frames = 0, frames;
@@ -555,21 +555,21 @@ static int ac3_eac3_probe(AVProbeData *p, enum CodecID expected_codec_id)
 }
 #endif
 
-#ifdef CONFIG_AC3_DEMUXER
+#if CONFIG_AC3_DEMUXER
 static int ac3_probe(AVProbeData *p)
 {
     return ac3_eac3_probe(p, CODEC_ID_AC3);
 }
 #endif
 
-#ifdef CONFIG_EAC3_DEMUXER
+#if CONFIG_EAC3_DEMUXER
 static int eac3_probe(AVProbeData *p)
 {
     return ac3_eac3_probe(p, CODEC_ID_EAC3);
 }
 #endif
 
-#ifdef CONFIG_FLAC_DEMUXER
+#if CONFIG_FLAC_DEMUXER
 static int flac_probe(AVProbeData *p)
 {
     if(memcmp(p->buf, "fLaC", 4)) return 0;
@@ -577,7 +577,7 @@ static int flac_probe(AVProbeData *p)
 }
 #endif
 
-#ifdef CONFIG_AAC_DEMUXER
+#if CONFIG_AAC_DEMUXER
 static int adts_aac_probe(AVProbeData *p)
 {
     int max_frames = 0, first_frames = 0;
@@ -612,7 +612,7 @@ static int adts_aac_probe(AVProbeData *p)
 
 /* Note: Do not forget to add new entries to the Makefile as well. */
 
-#ifdef CONFIG_AAC_DEMUXER
+#if CONFIG_AAC_DEMUXER
 AVInputFormat aac_demuxer = {
     "aac",
     NULL_IF_CONFIG_SMALL("ADTS AAC"),
@@ -626,7 +626,7 @@ AVInputFormat aac_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_AC3_DEMUXER
+#if CONFIG_AC3_DEMUXER
 AVInputFormat ac3_demuxer = {
     "ac3",
     NULL_IF_CONFIG_SMALL("raw AC-3"),
@@ -640,7 +640,7 @@ AVInputFormat ac3_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_AC3_MUXER
+#if CONFIG_AC3_MUXER
 AVOutputFormat ac3_muxer = {
     "ac3",
     NULL_IF_CONFIG_SMALL("raw AC-3"),
@@ -655,7 +655,7 @@ AVOutputFormat ac3_muxer = {
 };
 #endif
 
-#ifdef CONFIG_DIRAC_DEMUXER
+#if CONFIG_DIRAC_DEMUXER
 AVInputFormat dirac_demuxer = {
     "dirac",
     NULL_IF_CONFIG_SMALL("raw Dirac"),
@@ -668,7 +668,7 @@ AVInputFormat dirac_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_DIRAC_MUXER
+#if CONFIG_DIRAC_MUXER
 AVOutputFormat dirac_muxer = {
     "dirac",
     NULL_IF_CONFIG_SMALL("raw Dirac"),
@@ -683,7 +683,7 @@ AVOutputFormat dirac_muxer = {
 };
 #endif
 
-#ifdef CONFIG_DNXHD_DEMUXER
+#if CONFIG_DNXHD_DEMUXER
 AVInputFormat dnxhd_demuxer = {
     "dnxhd",
     NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),
@@ -696,7 +696,7 @@ AVInputFormat dnxhd_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_DNXHD_MUXER
+#if CONFIG_DNXHD_MUXER
 AVOutputFormat dnxhd_muxer = {
     "dnxhd",
     NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),
@@ -711,7 +711,7 @@ AVOutputFormat dnxhd_muxer = {
 };
 #endif
 
-#ifdef CONFIG_DTS_DEMUXER
+#if CONFIG_DTS_DEMUXER
 AVInputFormat dts_demuxer = {
     "dts",
     NULL_IF_CONFIG_SMALL("raw DTS"),
@@ -725,7 +725,7 @@ AVInputFormat dts_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_DTS_MUXER
+#if CONFIG_DTS_MUXER
 AVOutputFormat dts_muxer = {
     "dts",
     NULL_IF_CONFIG_SMALL("raw DTS"),
@@ -740,7 +740,7 @@ AVOutputFormat dts_muxer = {
 };
 #endif
 
-#ifdef CONFIG_EAC3_DEMUXER
+#if CONFIG_EAC3_DEMUXER
 AVInputFormat eac3_demuxer = {
     "eac3",
     NULL_IF_CONFIG_SMALL("raw E-AC-3"),
@@ -754,7 +754,7 @@ AVInputFormat eac3_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_EAC3_MUXER
+#if CONFIG_EAC3_MUXER
 AVOutputFormat eac3_muxer = {
     "eac3",
     NULL_IF_CONFIG_SMALL("raw E-AC-3"),
@@ -769,7 +769,7 @@ AVOutputFormat eac3_muxer = {
 };
 #endif
 
-#ifdef CONFIG_FLAC_DEMUXER
+#if CONFIG_FLAC_DEMUXER
 AVInputFormat flac_demuxer = {
     "flac",
     NULL_IF_CONFIG_SMALL("raw FLAC"),
@@ -783,7 +783,7 @@ AVInputFormat flac_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_FLAC_MUXER
+#if CONFIG_FLAC_MUXER
 AVOutputFormat flac_muxer = {
     "flac",
     NULL_IF_CONFIG_SMALL("raw FLAC"),
@@ -799,7 +799,7 @@ AVOutputFormat flac_muxer = {
 };
 #endif
 
-#ifdef CONFIG_GSM_DEMUXER
+#if CONFIG_GSM_DEMUXER
 AVInputFormat gsm_demuxer = {
     "gsm",
     NULL_IF_CONFIG_SMALL("GSM"),
@@ -813,7 +813,7 @@ AVInputFormat gsm_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_H261_DEMUXER
+#if CONFIG_H261_DEMUXER
 AVInputFormat h261_demuxer = {
     "h261",
     NULL_IF_CONFIG_SMALL("raw H.261"),
@@ -827,7 +827,7 @@ AVInputFormat h261_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_H261_MUXER
+#if CONFIG_H261_MUXER
 AVOutputFormat h261_muxer = {
     "h261",
     NULL_IF_CONFIG_SMALL("raw H.261"),
@@ -842,7 +842,7 @@ AVOutputFormat h261_muxer = {
 };
 #endif
 
-#ifdef CONFIG_H263_DEMUXER
+#if CONFIG_H263_DEMUXER
 AVInputFormat h263_demuxer = {
     "h263",
     NULL_IF_CONFIG_SMALL("raw H.263"),
@@ -856,7 +856,7 @@ AVInputFormat h263_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_H263_MUXER
+#if CONFIG_H263_MUXER
 AVOutputFormat h263_muxer = {
     "h263",
     NULL_IF_CONFIG_SMALL("raw H.263"),
@@ -871,7 +871,7 @@ AVOutputFormat h263_muxer = {
 };
 #endif
 
-#ifdef CONFIG_H264_DEMUXER
+#if CONFIG_H264_DEMUXER
 AVInputFormat h264_demuxer = {
     "h264",
     NULL_IF_CONFIG_SMALL("raw H.264 video format"),
@@ -885,7 +885,7 @@ AVInputFormat h264_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_H264_MUXER
+#if CONFIG_H264_MUXER
 AVOutputFormat h264_muxer = {
     "h264",
     NULL_IF_CONFIG_SMALL("raw H.264 video format"),
@@ -900,7 +900,7 @@ AVOutputFormat h264_muxer = {
 };
 #endif
 
-#ifdef CONFIG_INGENIENT_DEMUXER
+#if CONFIG_INGENIENT_DEMUXER
 AVInputFormat ingenient_demuxer = {
     "ingenient",
     NULL_IF_CONFIG_SMALL("Ingenient MJPEG"),
@@ -914,7 +914,7 @@ AVInputFormat ingenient_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_M4V_DEMUXER
+#if CONFIG_M4V_DEMUXER
 AVInputFormat m4v_demuxer = {
     "m4v",
     NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
@@ -928,7 +928,7 @@ AVInputFormat m4v_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_M4V_MUXER
+#if CONFIG_M4V_MUXER
 AVOutputFormat m4v_muxer = {
     "m4v",
     NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
@@ -943,7 +943,7 @@ AVOutputFormat m4v_muxer = {
 };
 #endif
 
-#ifdef CONFIG_MJPEG_DEMUXER
+#if CONFIG_MJPEG_DEMUXER
 AVInputFormat mjpeg_demuxer = {
     "mjpeg",
     NULL_IF_CONFIG_SMALL("MJPEG video"),
@@ -957,7 +957,7 @@ AVInputFormat mjpeg_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_MJPEG_MUXER
+#if CONFIG_MJPEG_MUXER
 AVOutputFormat mjpeg_muxer = {
     "mjpeg",
     NULL_IF_CONFIG_SMALL("MJPEG video"),
@@ -972,7 +972,7 @@ AVOutputFormat mjpeg_muxer = {
 };
 #endif
 
-#ifdef CONFIG_MLP_DEMUXER
+#if CONFIG_MLP_DEMUXER
 AVInputFormat mlp_demuxer = {
     "mlp",
     NULL_IF_CONFIG_SMALL("raw MLP"),
@@ -986,7 +986,7 @@ AVInputFormat mlp_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_MPEG1VIDEO_MUXER
+#if CONFIG_MPEG1VIDEO_MUXER
 AVOutputFormat mpeg1video_muxer = {
     "mpeg1video",
     NULL_IF_CONFIG_SMALL("MPEG video"),
@@ -1001,7 +1001,7 @@ AVOutputFormat mpeg1video_muxer = {
 };
 #endif
 
-#ifdef CONFIG_MPEG2VIDEO_MUXER
+#if CONFIG_MPEG2VIDEO_MUXER
 AVOutputFormat mpeg2video_muxer = {
     "mpeg2video",
     NULL_IF_CONFIG_SMALL("MPEG-2 video"),
@@ -1016,7 +1016,7 @@ AVOutputFormat mpeg2video_muxer = {
 };
 #endif
 
-#ifdef CONFIG_MPEGVIDEO_DEMUXER
+#if CONFIG_MPEGVIDEO_DEMUXER
 AVInputFormat mpegvideo_demuxer = {
     "mpegvideo",
     NULL_IF_CONFIG_SMALL("MPEG video"),
@@ -1029,7 +1029,7 @@ AVInputFormat mpegvideo_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_NULL_MUXER
+#if CONFIG_NULL_MUXER
 AVOutputFormat null_muxer = {
     "null",
     NULL_IF_CONFIG_SMALL("null video format"),
@@ -1048,7 +1048,7 @@ AVOutputFormat null_muxer = {
 };
 #endif
 
-#ifdef CONFIG_RAWVIDEO_DEMUXER
+#if CONFIG_RAWVIDEO_DEMUXER
 AVInputFormat rawvideo_demuxer = {
     "rawvideo",
     NULL_IF_CONFIG_SMALL("raw video format"),
@@ -1062,7 +1062,7 @@ AVInputFormat rawvideo_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_RAWVIDEO_MUXER
+#if CONFIG_RAWVIDEO_MUXER
 AVOutputFormat rawvideo_muxer = {
     "rawvideo",
     NULL_IF_CONFIG_SMALL("raw video format"),
@@ -1077,7 +1077,7 @@ AVOutputFormat rawvideo_muxer = {
 };
 #endif
 
-#ifdef CONFIG_ROQ_MUXER
+#if CONFIG_ROQ_MUXER
 AVOutputFormat roq_muxer =
 {
     "RoQ",
@@ -1092,7 +1092,7 @@ AVOutputFormat roq_muxer =
 };
 #endif
 
-#ifdef CONFIG_SHORTEN_DEMUXER
+#if CONFIG_SHORTEN_DEMUXER
 AVInputFormat shorten_demuxer = {
     "shn",
     NULL_IF_CONFIG_SMALL("raw Shorten"),
@@ -1106,7 +1106,7 @@ AVInputFormat shorten_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_VC1_DEMUXER
+#if CONFIG_VC1_DEMUXER
 AVInputFormat vc1_demuxer = {
     "vc1",
     NULL_IF_CONFIG_SMALL("raw VC-1"),
@@ -1151,13 +1151,13 @@ AVOutputFormat pcm_ ## name ## _muxer = {\
 };
 
 
-#if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
+#if  !CONFIG_MUXERS && CONFIG_DEMUXERS
 #define PCMDEF(name, long_name, ext, codec) \
         PCMINPUTDEF(name, long_name, ext, codec)
-#elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
+#elif CONFIG_MUXERS && !CONFIG_DEMUXERS
 #define PCMDEF(name, long_name, ext, codec) \
         PCMOUTPUTDEF(name, long_name, ext, codec)
-#elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
+#elif CONFIG_MUXERS && CONFIG_DEMUXERS
 #define PCMDEF(name, long_name, ext, codec) \
         PCMINPUTDEF(name, long_name, ext, codec)\
         PCMOUTPUTDEF(name, long_name, ext, codec)
diff --git a/libavformat/riff.c b/libavformat/riff.c
index ed7d9a5f22..270aecc6b6 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -248,7 +248,7 @@ const AVCodecTag codec_wav_tags[] = {
     { 0, 0 },
 };
 
-#ifdef CONFIG_MUXERS
+#if CONFIG_MUXERS
 int64_t start_tag(ByteIOContext *pb, const char *tag)
 {
     put_tag(pb, tag);
@@ -379,7 +379,7 @@ void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const AVCodecTag *ta
 }
 #endif //CONFIG_MUXERS
 
-#ifdef CONFIG_DEMUXERS
+#if CONFIG_DEMUXERS
 /* We could be given one of the three possible structures here:
  * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
  * is an expansion of the previous one with the fields added
diff --git a/libavformat/rtpproto.c b/libavformat/rtpproto.c
index b78c759b02..1933ab06dc 100644
--- a/libavformat/rtpproto.c
+++ b/libavformat/rtpproto.c
@@ -32,7 +32,7 @@
 #include "network.h"
 #include "os_support.h"
 #include <fcntl.h>
-#ifdef HAVE_SYS_SELECT_H
+#if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 82e025f7d7..46a715909c 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -27,7 +27,7 @@
 #include "avformat.h"
 
 #include <sys/time.h>
-#ifdef HAVE_SYS_SELECT_H
+#if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #include <strings.h>
@@ -1502,7 +1502,7 @@ static int rtsp_read_close(AVFormatContext *s)
     return 0;
 }
 
-#ifdef CONFIG_RTSP_DEMUXER
+#if CONFIG_RTSP_DEMUXER
 AVInputFormat rtsp_demuxer = {
     "rtsp",
     NULL_IF_CONFIG_SMALL("RTSP input format"),
@@ -1595,7 +1595,7 @@ static int sdp_read_close(AVFormatContext *s)
     return 0;
 }
 
-#ifdef CONFIG_SDP_DEMUXER
+#if CONFIG_SDP_DEMUXER
 AVInputFormat sdp_demuxer = {
     "sdp",
     NULL_IF_CONFIG_SMALL("SDP"),
@@ -1607,7 +1607,7 @@ AVInputFormat sdp_demuxer = {
 };
 #endif
 
-#ifdef CONFIG_REDIR_DEMUXER
+#if CONFIG_REDIR_DEMUXER
 /* dummy redirector format (used directly in av_open_input_file now) */
 static int redir_probe(AVProbeData *pd)
 {
diff --git a/libavformat/sdp.c b/libavformat/sdp.c
index d22f516c55..09541e3672 100644
--- a/libavformat/sdp.c
+++ b/libavformat/sdp.c
@@ -25,7 +25,7 @@
 #include "avc.h"
 #include "rtp.h"
 
-#ifdef CONFIG_RTP_MUXER
+#if CONFIG_RTP_MUXER
 #define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
 
 struct sdp_session_level {
diff --git a/libavformat/swfenc.c b/libavformat/swfenc.c
index 52e3c7270f..1431daf589 100644
--- a/libavformat/swfenc.c
+++ b/libavformat/swfenc.c
@@ -503,7 +503,7 @@ static int swf_write_trailer(AVFormatContext *s)
     return 0;
 }
 
-#ifdef CONFIG_SWF_MUXER
+#if CONFIG_SWF_MUXER
 AVOutputFormat swf_muxer = {
     "swf",
     NULL_IF_CONFIG_SMALL("Flash format"),
@@ -517,7 +517,7 @@ AVOutputFormat swf_muxer = {
     swf_write_trailer,
 };
 #endif
-#ifdef CONFIG_AVM2_MUXER
+#if CONFIG_AVM2_MUXER
 AVOutputFormat avm2_muxer = {
     "avm2",
     NULL_IF_CONFIG_SMALL("Flash 9 (AVM2) format"),
diff --git a/libavformat/tcp.c b/libavformat/tcp.c
index 05844517e5..d7eede61d2 100644
--- a/libavformat/tcp.c
+++ b/libavformat/tcp.c
@@ -22,7 +22,7 @@
 #include <unistd.h>
 #include "network.h"
 #include "os_support.h"
-#ifdef HAVE_SYS_SELECT_H
+#if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #include <sys/time.h>
diff --git a/libavformat/udp.c b/libavformat/udp.c
index 1101ffcf9a..f433e075af 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -29,7 +29,7 @@
 #include <unistd.h>
 #include "network.h"
 #include "os_support.h"
-#ifdef HAVE_SYS_SELECT_H
+#if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #include <sys/time.h>
@@ -52,7 +52,7 @@ typedef struct {
     int is_multicast;
     int local_port;
     int reuse_socket;
-#ifndef CONFIG_IPV6
+#if !CONFIG_IPV6
     struct sockaddr_in dest_addr;
 #else
     struct sockaddr_storage dest_addr;
@@ -72,7 +72,7 @@ static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr
         }
     }
 #endif
-#ifdef CONFIG_IPV6
+#if CONFIG_IPV6
     if (addr->sa_family == AF_INET6) {
         if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
             av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS): %s\n", strerror(errno));
@@ -96,7 +96,7 @@ static int udp_join_multicast_group(int sockfd, struct sockaddr *addr) {
         }
     }
 #endif
-#ifdef CONFIG_IPV6
+#if CONFIG_IPV6
     if (addr->sa_family == AF_INET6) {
         struct ipv6_mreq mreq6;
 
@@ -124,7 +124,7 @@ static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) {
         }
     }
 #endif
-#ifdef CONFIG_IPV6
+#if CONFIG_IPV6
     if (addr->sa_family == AF_INET6) {
         struct ipv6_mreq mreq6;
 
@@ -139,7 +139,7 @@ static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) {
     return 0;
 }
 
-#ifdef CONFIG_IPV6
+#if CONFIG_IPV6
 static struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
     struct addrinfo hints, *res = 0;
     int error;
@@ -342,7 +342,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
     int is_output;
     const char *p;
     char buf[256];
-#ifndef CONFIG_IPV6
+#if !CONFIG_IPV6
     struct sockaddr_in my_addr;
 #else
     struct sockaddr_storage my_addr;
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 707e47edb9..a675048744 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -160,7 +160,7 @@ AVOutputFormat *guess_format(const char *short_name, const char *filename,
     int score_max, score;
 
     /* specific test for image sequences */
-#ifdef CONFIG_IMAGE2_MUXER
+#if CONFIG_IMAGE2_MUXER
     if (!short_name && filename &&
         av_filename_number_test(filename) &&
         av_guess_image2_codec(filename) != CODEC_ID_NONE) {
@@ -214,7 +214,7 @@ enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
     if(type == CODEC_TYPE_VIDEO){
         enum CodecID codec_id= CODEC_ID_NONE;
 
-#ifdef CONFIG_IMAGE2_MUXER
+#if CONFIG_IMAGE2_MUXER
         if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
             codec_id= av_guess_image2_codec(filename);
         }
diff --git a/libavformat/wav.c b/libavformat/wav.c
index 01923d5aad..7aec532fe9 100644
--- a/libavformat/wav.c
+++ b/libavformat/wav.c
@@ -30,7 +30,7 @@ typedef struct {
     int last_duration;
 } WAVContext;
 
-#ifdef CONFIG_WAV_MUXER
+#if CONFIG_WAV_MUXER
 static int wav_write_header(AVFormatContext *s)
 {
     WAVContext *wav = s->priv_data;
@@ -256,7 +256,7 @@ static int wav_read_seek(AVFormatContext *s,
     return pcm_read_seek(s, stream_index, timestamp, flags);
 }
 
-#ifdef CONFIG_WAV_DEMUXER
+#if CONFIG_WAV_DEMUXER
 AVInputFormat wav_demuxer = {
     "wav",
     NULL_IF_CONFIG_SMALL("WAV format"),
@@ -270,7 +270,7 @@ AVInputFormat wav_demuxer = {
     .codec_tag= (const AVCodecTag* const []){codec_wav_tags, 0},
 };
 #endif
-#ifdef CONFIG_WAV_MUXER
+#if CONFIG_WAV_MUXER
 AVOutputFormat wav_muxer = {
     "wav",
     NULL_IF_CONFIG_SMALL("WAV format"),
diff --git a/libavformat/westwood.c b/libavformat/westwood.c
index 1c769466de..753daca571 100644
--- a/libavformat/westwood.c
+++ b/libavformat/westwood.c
@@ -371,7 +371,7 @@ static int wsvqa_read_packet(AVFormatContext *s,
     return ret;
 }
 
-#ifdef CONFIG_WSAUD_DEMUXER
+#if CONFIG_WSAUD_DEMUXER
 AVInputFormat wsaud_demuxer = {
     "wsaud",
     NULL_IF_CONFIG_SMALL("Westwood Studios audio format"),
@@ -381,7 +381,7 @@ AVInputFormat wsaud_demuxer = {
     wsaud_read_packet,
 };
 #endif
-#ifdef CONFIG_WSVQA_DEMUXER
+#if CONFIG_WSVQA_DEMUXER
 AVInputFormat wsvqa_demuxer = {
     "wsvqa",
     NULL_IF_CONFIG_SMALL("Westwood Studios VQA format"),
diff --git a/libavformat/yuv4mpeg.c b/libavformat/yuv4mpeg.c
index bc6c781bcf..6a5e8ee09d 100644
--- a/libavformat/yuv4mpeg.c
+++ b/libavformat/yuv4mpeg.c
@@ -29,7 +29,7 @@ struct frame_attributes {
     int top_field_first;
 };
 
-#ifdef CONFIG_YUV4MPEGPIPE_MUXER
+#if CONFIG_YUV4MPEGPIPE_MUXER
 static int yuv4_generate_header(AVFormatContext *s, char* buf)
 {
     AVStream *st;
@@ -382,7 +382,7 @@ static int yuv4_probe(AVProbeData *pd)
         return 0;
 }
 
-#ifdef CONFIG_YUV4MPEGPIPE_DEMUXER
+#if CONFIG_YUV4MPEGPIPE_DEMUXER
 AVInputFormat yuv4mpegpipe_demuxer = {
     "yuv4mpegpipe",
     NULL_IF_CONFIG_SMALL("YUV4MPEG pipe format"),
diff --git a/libavutil/adler32.c b/libavutil/adler32.c
index 148664e532..dad8dabed1 100644
--- a/libavutil/adler32.c
+++ b/libavutil/adler32.c
@@ -35,7 +35,7 @@ unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, unsigne
     unsigned long s2 = adler >> 16;
 
     while (len>0) {
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
         while(len>4 && s2 < (1U<<31)){
             DO4(buf); len-=4;
 #else
diff --git a/libavutil/aes.c b/libavutil/aes.c
index 5030dac487..1631cb6543 100644
--- a/libavutil/aes.c
+++ b/libavutil/aes.c
@@ -39,7 +39,7 @@ static const uint8_t rcon[10] = {
 
 static uint8_t     sbox[256];
 static uint8_t inv_sbox[256];
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
 static uint32_t enc_multbl[1][256];
 static uint32_t dec_multbl[1][256];
 #else
@@ -62,7 +62,7 @@ static void subshift(uint8_t s0[2][16], int s, uint8_t *box){
 }
 
 static inline int mix_core(uint32_t multbl[4][256], int a, int b, int c, int d){
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
 #define ROT(x,s) ((x<<s)|(x>>(32-s)))
     return multbl[0][a] ^ ROT(multbl[0][b], 8) ^ ROT(multbl[0][c], 16) ^ ROT(multbl[0][d], 24);
 #else
@@ -114,7 +114,7 @@ static void init_multbl2(uint8_t tbl[1024], int c[4], uint8_t *log8, uint8_t *al
         int x= sbox[i>>2];
         if(x) tbl[i]= alog8[ log8[x] + log8[c[i&3]] ];
     }
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
     for(j=256; j<1024; j++)
         for(i=0; i<4; i++)
             tbl[4*j+i]= tbl[4*j + ((i-1)&3) - 1024];
diff --git a/libavutil/arm/bswap.h b/libavutil/arm/bswap.h
index deb739407b..65c73c5ccb 100644
--- a/libavutil/arm/bswap.h
+++ b/libavutil/arm/bswap.h
@@ -23,7 +23,7 @@
 #include "config.h"
 #include "libavutil/common.h"
 
-#ifdef HAVE_ARMV6
+#if HAVE_ARMV6
 #define bswap_16 bswap_16
 static av_always_inline av_const uint16_t bswap_16(uint16_t x)
 {
@@ -35,7 +35,7 @@ static av_always_inline av_const uint16_t bswap_16(uint16_t x)
 #define bswap_32 bswap_32
 static av_always_inline av_const uint32_t bswap_32(uint32_t x)
 {
-#ifdef HAVE_ARMV6
+#if HAVE_ARMV6
     __asm__("rev %0, %0" : "+r"(x));
 #else
     uint32_t t;
diff --git a/libavutil/bswap.h b/libavutil/bswap.h
index 100ed1c262..41e98d4649 100644
--- a/libavutil/bswap.h
+++ b/libavutil/bswap.h
@@ -30,13 +30,13 @@
 #include "config.h"
 #include "common.h"
 
-#if defined(ARCH_ARM)
+#if   ARCH_ARM
 #   include "arm/bswap.h"
-#elif defined(ARCH_BFIN)
+#elif ARCH_BFIN
 #   include "bfin/bswap.h"
-#elif defined(ARCH_SH4)
+#elif ARCH_SH4
 #   include "sh4/bswap.h"
-#elif defined(ARCH_X86)
+#elif ARCH_X86
 #   include "x86/bswap.h"
 #endif
 
diff --git a/libavutil/common.h b/libavutil/common.h
index d66120fa66..ddeecad7dc 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -154,7 +154,7 @@ static inline av_const int av_log2_16bit(unsigned int v)
 /* median of 3 */
 static inline av_const int mid_pred(int a, int b, int c)
 {
-#ifdef HAVE_CMOV
+#if HAVE_CMOV
     int i=b;
     __asm__ volatile(
         "cmp    %2, %1 \n\t"
@@ -323,9 +323,9 @@ static inline av_pure int ff_get_fourcc(const char *s){
         }\
     }
 
-#if defined(ARCH_X86) || defined(ARCH_PPC) || defined(ARCH_BFIN)
+#if ARCH_X86 || ARCH_PPC || ARCH_BFIN
 #define AV_READ_TIME read_time
-#if defined(ARCH_X86)
+#if ARCH_X86
 static inline uint64_t read_time(void)
 {
     uint32_t a, d;
@@ -366,7 +366,7 @@ static inline uint64_t read_time(void)
      return (((uint64_t)tbu)<<32) | (uint64_t)tbl;
 }
 #endif
-#elif defined(HAVE_GETHRTIME)
+#elif HAVE_GETHRTIME
 #define AV_READ_TIME gethrtime
 #endif
 
@@ -397,11 +397,11 @@ tend= AV_READ_TIME();\
 #endif
 
 /**
- * Returns NULL if CONFIG_SMALL is defined otherwise the argument
+ * Returns NULL if CONFIG_SMALL is true otherwise the argument
  * without modifications, used to disable the definition of strings
  * (for example AVCodec long_names).
  */
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
 #   define NULL_IF_CONFIG_SMALL(x) NULL
 #else
 #   define NULL_IF_CONFIG_SMALL(x) x
diff --git a/libavutil/crc.c b/libavutil/crc.c
index cc968024d3..8b8a90e6a5 100644
--- a/libavutil/crc.c
+++ b/libavutil/crc.c
@@ -22,7 +22,7 @@
 #include "bswap.h"
 #include "crc.h"
 
-#ifdef CONFIG_HARDCODED_TABLES
+#if CONFIG_HARDCODED_TABLES
 #include "crc_data.h"
 #else
 static struct {
@@ -75,7 +75,7 @@ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){
         }
     }
     ctx[256]=1;
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
     if(ctx_size >= sizeof(AVCRC)*1024)
         for (i = 0; i < 256; i++)
             for(j=0; j<3; j++)
@@ -91,7 +91,7 @@ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){
  * @return a pointer to the CRC table or NULL on failure
  */
 const AVCRC *av_crc_get_table(AVCRCId crc_id){
-#ifndef CONFIG_HARDCODED_TABLES
+#if !CONFIG_HARDCODED_TABLES
     if (!av_crc_table[crc_id][FF_ARRAY_ELEMS(av_crc_table[crc_id])-1])
         if (av_crc_init(av_crc_table[crc_id],
                         av_crc_table_params[crc_id].le,
@@ -113,7 +113,7 @@ const AVCRC *av_crc_get_table(AVCRCId crc_id){
 uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length){
     const uint8_t *end= buffer+length;
 
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
     if(!ctx[256])
         while(buffer<end-3){
             crc ^= le2me_32(*(const uint32_t*)buffer); buffer+=4;
diff --git a/libavutil/des.c b/libavutil/des.c
index 43a14f6e6e..51d73a3c1e 100644
--- a/libavutil/des.c
+++ b/libavutil/des.c
@@ -74,7 +74,7 @@ static const uint8_t PC2_shuffle[] = {
 };
 #undef T
 
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
 static const uint8_t S_boxes[8][32] = {
     {
     0x0e, 0xf4, 0x7d, 0x41, 0xe2, 0x2f, 0xdb, 0x18, 0xa3, 0x6a, 0xc6, 0xbc, 0x95, 0x59, 0x30, 0x87,
@@ -218,7 +218,7 @@ static uint32_t f_func(uint32_t r, uint64_t k) {
     // apply S-boxes, those compress the data again from 8 * 6 to 8 * 4 bits
     for (i = 7; i >= 0; i--) {
         uint8_t tmp = (r ^ k) & 0x3f;
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
         uint8_t v = S_boxes[i][tmp >> 1];
         if (tmp & 1) v >>= 4;
         out = (out >> 4) | (v << 28);
@@ -229,7 +229,7 @@ static uint32_t f_func(uint32_t r, uint64_t k) {
         r = (r >> 4) | (r << 28);
         k >>= 6;
     }
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
     out = shuffle(out, P_shuffle, sizeof(P_shuffle));
 #endif
     return out;
diff --git a/libavutil/internal.h b/libavutil/internal.h
index 957566026d..52fa7e8c97 100644
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -102,7 +102,7 @@
 #endif
 
 // Use rip-relative addressing if compiling PIC code on x86-64.
-#if defined(ARCH_X86_64) && defined(PIC)
+#if ARCH_X86_64 && defined(PIC)
 #    define LOCAL_MANGLE(a) #a "(%%rip)"
 #else
 #    define LOCAL_MANGLE(a) #a
@@ -125,7 +125,7 @@
 
 extern const uint32_t ff_inverse[256];
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 #    define FASTDIV(a,b) \
     ({\
         int ret,dmy;\
@@ -136,7 +136,7 @@ extern const uint32_t ff_inverse[256];
             );\
         ret;\
     })
-#elif defined(HAVE_ARMV6)
+#elif HAVE_ARMV6
 static inline av_const int FASTDIV(int a, int b)
 {
     int r, t;
@@ -147,7 +147,7 @@ static inline av_const int FASTDIV(int a, int b)
                      : "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse));
     return r;
 }
-#elif defined(ARCH_ARM)
+#elif ARCH_ARM
 static inline av_const int FASTDIV(int a, int b)
 {
     int r, t;
@@ -155,7 +155,7 @@ static inline av_const int FASTDIV(int a, int b)
                       : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
     return r;
 }
-#elif defined(CONFIG_FASTDIV)
+#elif CONFIG_FASTDIV
 #    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
 #else
 #    define FASTDIV(a,b)   ((a)/(b))
@@ -171,7 +171,7 @@ static inline av_const unsigned int ff_sqrt(unsigned int a)
 
     if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
     else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
-#ifndef CONFIG_SMALL
+#if !CONFIG_SMALL
     else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
     else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ]   ;
 #endif
@@ -185,7 +185,7 @@ static inline av_const unsigned int ff_sqrt(unsigned int a)
     return b - (a<b*b);
 }
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 #define MASK_ABS(mask, level)\
             __asm__ volatile(\
                 "cltd                   \n\t"\
@@ -199,7 +199,7 @@ static inline av_const unsigned int ff_sqrt(unsigned int a)
             level= (level^mask)-mask;
 #endif
 
-#ifdef HAVE_CMOV
+#if HAVE_CMOV
 #define COPY3_IF_LT(x,y,a,b,c,d)\
 __asm__ volatile (\
     "cmpl %0, %3        \n\t"\
@@ -259,42 +259,42 @@ if((y)<(x)){\
     }\
 }
 
-#ifndef HAVE_LLRINT
+#if !HAVE_LLRINT
 static av_always_inline av_const long long llrint(double x)
 {
     return rint(x);
 }
 #endif /* HAVE_LLRINT */
 
-#ifndef HAVE_LRINT
+#if !HAVE_LRINT
 static av_always_inline av_const long int lrint(double x)
 {
     return rint(x);
 }
 #endif /* HAVE_LRINT */
 
-#ifndef HAVE_LRINTF
+#if !HAVE_LRINTF
 static av_always_inline av_const long int lrintf(float x)
 {
     return (int)(rint(x));
 }
 #endif /* HAVE_LRINTF */
 
-#ifndef HAVE_ROUND
+#if !HAVE_ROUND
 static av_always_inline av_const double round(double x)
 {
     return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
 }
 #endif /* HAVE_ROUND */
 
-#ifndef HAVE_ROUNDF
+#if !HAVE_ROUNDF
 static av_always_inline av_const float roundf(float x)
 {
     return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
 }
 #endif /* HAVE_ROUNDF */
 
-#ifndef HAVE_TRUNCF
+#if !HAVE_TRUNCF
 static av_always_inline av_const float truncf(float x)
 {
     return (x > 0) ? floor(x) : ceil(x);
diff --git a/libavutil/intreadwrite.h b/libavutil/intreadwrite.h
index 535fdd2dfe..7c5909ea51 100644
--- a/libavutil/intreadwrite.h
+++ b/libavutil/intreadwrite.h
@@ -66,7 +66,7 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed));
 #define AV_RL8(x)     AV_RB8(x)
 #define AV_WL8(p, d)  AV_WB8(p, d)
 
-#ifdef HAVE_FAST_UNALIGNED
+#if HAVE_FAST_UNALIGNED
 # ifdef WORDS_BIGENDIAN
 #  define AV_RB16(x)    AV_RN16(x)
 #  define AV_WB16(p, d) AV_WN16(p, d)
diff --git a/libavutil/md5.c b/libavutil/md5.c
index 87b4026dc1..289fa56d72 100644
--- a/libavutil/md5.c
+++ b/libavutil/md5.c
@@ -98,7 +98,7 @@ static void body(uint32_t ABCD[4], uint32_t X[16]){
         X[i]= bswap_32(X[i]);
 #endif
 
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
     for( i = 0; i < 64; i++ ){
         CORE(i,a,b,c,d)
         t=d; d=c; c=b; b=a; a=t;
diff --git a/libavutil/mem.c b/libavutil/mem.c
index 328bef787c..95299a1c0b 100644
--- a/libavutil/mem.c
+++ b/libavutil/mem.c
@@ -32,7 +32,7 @@
 #undef realloc
 
 #include <stdlib.h>
-#ifdef HAVE_MALLOC_H
+#if HAVE_MALLOC_H
 #include <malloc.h>
 #endif
 
@@ -43,7 +43,7 @@
 void *av_malloc(unsigned int size)
 {
     void *ptr = NULL;
-#ifdef CONFIG_MEMALIGN_HACK
+#if CONFIG_MEMALIGN_HACK
     long diff;
 #endif
 
@@ -51,16 +51,16 @@ void *av_malloc(unsigned int size)
     if(size > (INT_MAX-16) )
         return NULL;
 
-#ifdef CONFIG_MEMALIGN_HACK
+#if CONFIG_MEMALIGN_HACK
     ptr = malloc(size+16);
     if(!ptr)
         return ptr;
     diff= ((-(long)ptr - 1)&15) + 1;
     ptr = (char*)ptr + diff;
     ((char*)ptr)[-1]= diff;
-#elif defined (HAVE_POSIX_MEMALIGN)
+#elif HAVE_POSIX_MEMALIGN
     posix_memalign(&ptr,16,size);
-#elif defined (HAVE_MEMALIGN)
+#elif HAVE_MEMALIGN
     ptr = memalign(16,size);
     /* Why 64?
        Indeed, we should align it:
@@ -96,7 +96,7 @@ void *av_malloc(unsigned int size)
 
 void *av_realloc(void *ptr, unsigned int size)
 {
-#ifdef CONFIG_MEMALIGN_HACK
+#if CONFIG_MEMALIGN_HACK
     int diff;
 #endif
 
@@ -104,7 +104,7 @@ void *av_realloc(void *ptr, unsigned int size)
     if(size > (INT_MAX-16) )
         return NULL;
 
-#ifdef CONFIG_MEMALIGN_HACK
+#if CONFIG_MEMALIGN_HACK
     //FIXME this isn't aligned correctly, though it probably isn't needed
     if(!ptr) return av_malloc(size);
     diff= ((char*)ptr)[-1];
@@ -118,7 +118,7 @@ void av_free(void *ptr)
 {
     /* XXX: this test should not be needed on most libcs */
     if (ptr)
-#ifdef CONFIG_MEMALIGN_HACK
+#if CONFIG_MEMALIGN_HACK
         free((char*)ptr - ((char*)ptr)[-1]);
 #else
         free(ptr);
diff --git a/libavutil/mem.h b/libavutil/mem.h
index 3ea9858236..ec6e3b7456 100644
--- a/libavutil/mem.h
+++ b/libavutil/mem.h
@@ -37,7 +37,7 @@
 #elif defined(_MSC_VER)
     #define DECLARE_ALIGNED(n,t,v)      __declspec(align(n)) t v
     #define DECLARE_ASM_CONST(n,t,v)    __declspec(align(n)) static const t v
-#elif defined(HAVE_INLINE_ASM)
+#elif HAVE_INLINE_ASM
     #error The asm code needs alignment, but we do not know how to do it for this compiler.
 #else
     #define DECLARE_ALIGNED(n,t,v)      t v
diff --git a/libavutil/sha1.c b/libavutil/sha1.c
index 61ad38de28..72c2726e3b 100644
--- a/libavutil/sha1.c
+++ b/libavutil/sha1.c
@@ -54,7 +54,7 @@ static void transform(uint32_t state[5], const uint8_t buffer[64]){
     c = state[2];
     d = state[3];
     e = state[4];
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
     for(i=0; i<80; i++){
         int t;
         if(i<16) t= be2me_32(((uint32_t*)buffer)[i]);
@@ -110,7 +110,7 @@ void av_sha1_update(AVSHA1* ctx, const uint8_t* data, unsigned int len){
 
     j = ctx->count & 63;
     ctx->count += len;
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
     for( i = 0; i < len; i++ ){
         ctx->buffer[ j++ ] = data[i];
         if( 64 == j ){
diff --git a/libavutil/x86/bswap.h b/libavutil/x86/bswap.h
index c52b5290e1..0ff8a93385 100644
--- a/libavutil/x86/bswap.h
+++ b/libavutil/x86/bswap.h
@@ -38,7 +38,7 @@ static av_always_inline av_const uint16_t bswap_16(uint16_t x)
 #define bswap_32 bswap_32
 static av_always_inline av_const uint32_t bswap_32(uint32_t x)
 {
-#ifdef HAVE_BSWAP
+#if HAVE_BSWAP
     __asm__("bswap   %0" : "+r" (x));
 #else
     __asm__("rorw    $8,  %w0 \n\t"
@@ -49,7 +49,7 @@ static av_always_inline av_const uint32_t bswap_32(uint32_t x)
     return x;
 }
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 #define bswap_64 bswap_64
 static inline uint64_t av_const bswap_64(uint64_t x)
 {
diff --git a/libavutil/x86_cpu.h b/libavutil/x86_cpu.h
index 4b5f10527e..d29b7d8ad9 100644
--- a/libavutil/x86_cpu.h
+++ b/libavutil/x86_cpu.h
@@ -24,7 +24,7 @@
 #include <stdint.h>
 #include "config.h"
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 #    define REG_a "rax"
 #    define REG_b "rbx"
 #    define REG_c "rcx"
@@ -64,15 +64,10 @@ typedef int32_t x86_reg;
 #    define REGSP   esp
 #endif
 
-#if defined(ARCH_X86_64) || (defined(ARCH_X86_32) && defined(HAVE_EBX_AVAILABLE) && defined(HAVE_EBP_AVAILABLE))
-#    define HAVE_7REGS 1
-#endif
-
-#if defined(ARCH_X86_64) || (defined(ARCH_X86_32) && (defined(HAVE_EBX_AVAILABLE) || defined(HAVE_EBP_AVAILABLE)))
-#    define HAVE_6REGS 1
-#endif
+#define HAVE_7REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE))
+#define HAVE_6REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE || HAVE_EBP_AVAILABLE))
 
-#if defined(ARCH_X86_64) && defined(PIC)
+#if ARCH_X86_64 && defined(PIC)
 #    define BROKEN_RELOCATIONS 1
 #endif
 
diff --git a/libpostproc/postprocess.c b/libpostproc/postprocess.c
index b2f5badaa4..a41f28bc66 100644
--- a/libpostproc/postprocess.c
+++ b/libpostproc/postprocess.c
@@ -92,7 +92,7 @@ unsigned postproc_version(void)
     return LIBPOSTPROC_VERSION_INT;
 }
 
-#ifdef HAVE_ALTIVEC_H
+#if HAVE_ALTIVEC_H
 #include <altivec.h>
 #endif
 
@@ -102,7 +102,7 @@ unsigned postproc_version(void)
 #define TEMP_STRIDE 8
 //#define NUM_BLOCKS_AT_ONCE 16 //not used yet
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 DECLARE_ASM_CONST(8, uint64_t, w05)= 0x0005000500050005LL;
 DECLARE_ASM_CONST(8, uint64_t, w04)= 0x0004000400040004LL;
 DECLARE_ASM_CONST(8, uint64_t, w20)= 0x0020002000200020LL;
@@ -150,7 +150,7 @@ static const char *replaceTable[]=
 };
 
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 static inline void prefetchnta(void *p)
 {
     __asm__ volatile(   "prefetchnta (%0)\n\t"
@@ -554,45 +554,47 @@ static av_always_inline void do_a_deblock_C(uint8_t *src, int step, int stride,
 
 //Note: we have C, MMX, MMX2, 3DNOW version there is no 3DNOW+MMX2 one
 //Plain C versions
-#if !(defined (HAVE_MMX) || defined (HAVE_ALTIVEC)) || defined (RUNTIME_CPUDETECT)
+#if !(HAVE_MMX || HAVE_ALTIVEC) || defined (RUNTIME_CPUDETECT)
 #define COMPILE_C
 #endif
 
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
 #define COMPILE_ALTIVEC
 #endif //HAVE_ALTIVEC
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 
-#if (defined (HAVE_MMX) && !defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)
+#if (HAVE_MMX && !HAVE_3DNOW && !HAVE_MMX2) || defined (RUNTIME_CPUDETECT)
 #define COMPILE_MMX
 #endif
 
-#if defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)
+#if HAVE_MMX2 || defined (RUNTIME_CPUDETECT)
 #define COMPILE_MMX2
 #endif
 
-#if (defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)
+#if (HAVE_3DNOW && !HAVE_MMX2) || defined (RUNTIME_CPUDETECT)
 #define COMPILE_3DNOW
 #endif
-#endif /* defined(ARCH_X86) */
+#endif /* ARCH_X86 */
 
 #undef HAVE_MMX
+#define HAVE_MMX 0
 #undef HAVE_MMX2
+#define HAVE_MMX2 0
 #undef HAVE_3DNOW
+#define HAVE_3DNOW 0
 #undef HAVE_ALTIVEC
+#define HAVE_ALTIVEC 0
 
 #ifdef COMPILE_C
-#undef HAVE_MMX
-#undef HAVE_MMX2
-#undef HAVE_3DNOW
 #define RENAME(a) a ## _C
 #include "postprocess_template.c"
 #endif
 
 #ifdef COMPILE_ALTIVEC
 #undef RENAME
-#define HAVE_ALTIVEC
+#undef HAVE_ALTIVEC
+#define HAVE_ALTIVEC 1
 #define RENAME(a) a ## _altivec
 #include "postprocess_altivec_template.c"
 #include "postprocess_template.c"
@@ -601,9 +603,8 @@ static av_always_inline void do_a_deblock_C(uint8_t *src, int step, int stride,
 //MMX versions
 #ifdef COMPILE_MMX
 #undef RENAME
-#define HAVE_MMX
-#undef HAVE_MMX2
-#undef HAVE_3DNOW
+#undef HAVE_MMX
+#define HAVE_MMX 1
 #define RENAME(a) a ## _MMX
 #include "postprocess_template.c"
 #endif
@@ -611,9 +612,10 @@ static av_always_inline void do_a_deblock_C(uint8_t *src, int step, int stride,
 //MMX2 versions
 #ifdef COMPILE_MMX2
 #undef RENAME
-#define HAVE_MMX
-#define HAVE_MMX2
-#undef HAVE_3DNOW
+#undef HAVE_MMX
+#undef HAVE_MMX2
+#define HAVE_MMX 1
+#define HAVE_MMX2 1
 #define RENAME(a) a ## _MMX2
 #include "postprocess_template.c"
 #endif
@@ -621,9 +623,12 @@ static av_always_inline void do_a_deblock_C(uint8_t *src, int step, int stride,
 //3DNOW versions
 #ifdef COMPILE_3DNOW
 #undef RENAME
-#define HAVE_MMX
+#undef HAVE_MMX
 #undef HAVE_MMX2
-#define HAVE_3DNOW
+#undef HAVE_3DNOW
+#define HAVE_MMX 1
+#define HAVE_MMX2 0
+#define HAVE_3DNOW 1
 #define RENAME(a) a ## _3DNow
 #include "postprocess_template.c"
 #endif
@@ -641,7 +646,7 @@ static inline void postProcess(const uint8_t src[], int srcStride, uint8_t dst[]
     // difference would not be measurable here but it is much better because
     // someone might exchange the CPU whithout restarting MPlayer ;)
 #ifdef RUNTIME_CPUDETECT
-#if defined(ARCH_X86)
+#if ARCH_X86
     // ordered per speed fastest first
     if(c->cpuCaps & PP_CPU_CAPS_MMX2)
         postProcess_MMX2(src, srcStride, dst, dstStride, width, height, QPs, QPStride, isColor, c);
@@ -652,7 +657,7 @@ static inline void postProcess(const uint8_t src[], int srcStride, uint8_t dst[]
     else
         postProcess_C(src, srcStride, dst, dstStride, width, height, QPs, QPStride, isColor, c);
 #else
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
     if(c->cpuCaps & PP_CPU_CAPS_ALTIVEC)
             postProcess_altivec(src, srcStride, dst, dstStride, width, height, QPs, QPStride, isColor, c);
     else
@@ -660,13 +665,13 @@ static inline void postProcess(const uint8_t src[], int srcStride, uint8_t dst[]
             postProcess_C(src, srcStride, dst, dstStride, width, height, QPs, QPStride, isColor, c);
 #endif
 #else //RUNTIME_CPUDETECT
-#ifdef HAVE_MMX2
+#if   HAVE_MMX2
             postProcess_MMX2(src, srcStride, dst, dstStride, width, height, QPs, QPStride, isColor, c);
-#elif defined (HAVE_3DNOW)
+#elif HAVE_3DNOW
             postProcess_3DNow(src, srcStride, dst, dstStride, width, height, QPs, QPStride, isColor, c);
-#elif defined (HAVE_MMX)
+#elif HAVE_MMX
             postProcess_MMX(src, srcStride, dst, dstStride, width, height, QPs, QPStride, isColor, c);
-#elif defined (HAVE_ALTIVEC)
+#elif HAVE_ALTIVEC
             postProcess_altivec(src, srcStride, dst, dstStride, width, height, QPs, QPStride, isColor, c);
 #else
             postProcess_C(src, srcStride, dst, dstStride, width, height, QPs, QPStride, isColor, c);
diff --git a/libpostproc/postprocess_template.c b/libpostproc/postprocess_template.c
index 05dc837207..908c5c764b 100644
--- a/libpostproc/postprocess_template.c
+++ b/libpostproc/postprocess_template.c
@@ -31,32 +31,32 @@
 #undef PMINUB
 #undef PMAXUB
 
-#ifdef HAVE_MMX2
+#if   HAVE_MMX2
 #define REAL_PAVGB(a,b) "pavgb " #a ", " #b " \n\t"
-#elif defined (HAVE_3DNOW)
+#elif HAVE_3DNOW
 #define REAL_PAVGB(a,b) "pavgusb " #a ", " #b " \n\t"
 #endif
 #define PAVGB(a,b)  REAL_PAVGB(a,b)
 
-#ifdef HAVE_MMX2
+#if   HAVE_MMX2
 #define PMINUB(a,b,t) "pminub " #a ", " #b " \n\t"
-#elif defined (HAVE_MMX)
+#elif HAVE_MMX
 #define PMINUB(b,a,t) \
     "movq " #a ", " #t " \n\t"\
     "psubusb " #b ", " #t " \n\t"\
     "psubb " #t ", " #a " \n\t"
 #endif
 
-#ifdef HAVE_MMX2
+#if   HAVE_MMX2
 #define PMAXUB(a,b) "pmaxub " #a ", " #b " \n\t"
-#elif defined (HAVE_MMX)
+#elif HAVE_MMX
 #define PMAXUB(a,b) \
     "psubusb " #a ", " #b " \n\t"\
     "paddb " #a ", " #b " \n\t"
 #endif
 
 //FIXME? |255-0| = 1 (should not be a problem ...)
-#ifdef HAVE_MMX
+#if HAVE_MMX
 /**
  * Check if the middle 8x8 Block in the given 8x16 block is flat
  */
@@ -136,7 +136,7 @@ static inline int RENAME(vertClassify)(uint8_t src[], int stride, PPContext *c){
         "psubusb %%mm3, %%mm4                   \n\t"
 
         "                                       \n\t"
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         "pxor %%mm7, %%mm7                      \n\t"
         "psadbw %%mm7, %%mm0                    \n\t"
 #else
@@ -176,10 +176,10 @@ static inline int RENAME(vertClassify)(uint8_t src[], int stride, PPContext *c){
  * Do a vertical low pass filter on the 8x16 block (only write to the 8x8 block in the middle)
  * using the 9-Tap Filter (1,1,2,2,4,2,2,1,1)/16
  */
-#ifndef HAVE_ALTIVEC
+#if !HAVE_ALTIVEC
 static inline void RENAME(doVertLowPass)(uint8_t *src, int stride, PPContext *c)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     src+= stride*3;
     __asm__ volatile(        //"movv %0 %1 %2\n\t"
         "movq %2, %%mm0                         \n\t"  // QP,..., QP
@@ -306,7 +306,7 @@ static inline void RENAME(doVertLowPass)(uint8_t *src, int stride, PPContext *c)
         : "r" (src), "r" ((x86_reg)stride), "m" (c->pQPb)
         : "%"REG_a, "%"REG_c
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
     const int l1= stride;
     const int l2= stride + l1;
     const int l3= stride + l2;
@@ -345,7 +345,7 @@ static inline void RENAME(doVertLowPass)(uint8_t *src, int stride, PPContext *c)
 
         src++;
     }
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 #endif //HAVE_ALTIVEC
 
@@ -364,7 +364,7 @@ static inline void RENAME(doVertLowPass)(uint8_t *src, int stride, PPContext *c)
  */
 static inline void RENAME(vertRK1Filter)(uint8_t *src, int stride, int QP)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     src+= stride*3;
 // FIXME rounding
     __asm__ volatile(
@@ -426,7 +426,7 @@ static inline void RENAME(vertRK1Filter)(uint8_t *src, int stride, int QP)
         : "r" (src), "r" ((x86_reg)stride)
         : "%"REG_a, "%"REG_c
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
     const int l1= stride;
     const int l2= stride + l1;
     const int l3= stride + l2;
@@ -449,7 +449,7 @@ static inline void RENAME(vertRK1Filter)(uint8_t *src, int stride, int QP)
         }
     }
 
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 #endif //0
 
@@ -462,7 +462,7 @@ static inline void RENAME(vertRK1Filter)(uint8_t *src, int stride, int QP)
  */
 static inline void RENAME(vertX1Filter)(uint8_t *src, int stride, PPContext *co)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     src+= stride*3;
 
     __asm__ volatile(
@@ -548,7 +548,7 @@ static inline void RENAME(vertX1Filter)(uint8_t *src, int stride, PPContext *co)
         : "r" (src), "r" ((x86_reg)stride), "m" (co->pQPb)
         : "%"REG_a, "%"REG_c
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
 
     const int l1= stride;
     const int l2= stride + l1;
@@ -582,13 +582,13 @@ static inline void RENAME(vertX1Filter)(uint8_t *src, int stride, PPContext *co)
         }
         src++;
     }
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 
-#ifndef HAVE_ALTIVEC
+#if !HAVE_ALTIVEC
 static inline void RENAME(doVertDefFilter)(uint8_t src[], int stride, PPContext *c)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
 /*
     uint8_t tmp[16];
     const int l1= stride;
@@ -869,7 +869,7 @@ static inline void RENAME(doVertDefFilter)(uint8_t src[], int stride, PPContext
     }
 }
 */
-#elif defined (HAVE_MMX)
+#elif HAVE_MMX
     src+= stride*4;
     __asm__ volatile(
         "pxor %%mm7, %%mm7                      \n\t"
@@ -978,7 +978,7 @@ static inline void RENAME(doVertDefFilter)(uint8_t src[], int stride, PPContext
         "movq (%%"REG_c"), %%mm2                \n\t" // 2L0 - 5L1 + 5L2 - 2L3
         "movq 8(%%"REG_c"), %%mm3               \n\t" // 2H0 - 5H1 + 5H2 - 2H3
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         "movq %%mm7, %%mm6                      \n\t" // 0
         "psubw %%mm0, %%mm6                     \n\t"
         "pmaxsw %%mm6, %%mm0                    \n\t" // |2L4 - 5L5 + 5L6 - 2L7|
@@ -1010,7 +1010,7 @@ static inline void RENAME(doVertDefFilter)(uint8_t src[], int stride, PPContext
         "psubw %%mm6, %%mm3                     \n\t" // |2H0 - 5H1 + 5H2 - 2H3|
 #endif
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         "pminsw %%mm2, %%mm0                    \n\t"
         "pminsw %%mm3, %%mm1                    \n\t"
 #else
@@ -1074,7 +1074,7 @@ static inline void RENAME(doVertDefFilter)(uint8_t src[], int stride, PPContext
         "pand %%mm2, %%mm4                      \n\t"
         "pand %%mm3, %%mm5                      \n\t"
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         "pminsw %%mm0, %%mm4                    \n\t"
         "pminsw %%mm1, %%mm5                    \n\t"
 #else
@@ -1101,7 +1101,7 @@ static inline void RENAME(doVertDefFilter)(uint8_t src[], int stride, PPContext
         : "r" ((x86_reg)stride), "m" (c->pQPb)
         : "%"REG_a, "%"REG_c
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
     const int l1= stride;
     const int l2= stride + l1;
     const int l3= stride + l2;
@@ -1139,14 +1139,14 @@ static inline void RENAME(doVertDefFilter)(uint8_t src[], int stride, PPContext
         }
         src++;
     }
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 #endif //HAVE_ALTIVEC
 
-#ifndef HAVE_ALTIVEC
+#if !HAVE_ALTIVEC
 static inline void RENAME(dering)(uint8_t src[], int stride, PPContext *c)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     __asm__ volatile(
         "pxor %%mm6, %%mm6                      \n\t"
         "pcmpeqb %%mm7, %%mm7                   \n\t"
@@ -1164,7 +1164,7 @@ static inline void RENAME(dering)(uint8_t src[], int stride, PPContext *c)
 //        %0        eax        eax+%1        eax+2%1        %0+4%1        edx        edx+%1        edx+2%1        %0+8%1        edx+4%1
 
 #undef FIND_MIN_MAX
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 #define REAL_FIND_MIN_MAX(addr)\
         "movq " #addr ", %%mm0                  \n\t"\
         "pminub %%mm0, %%mm7                    \n\t"\
@@ -1191,7 +1191,7 @@ FIND_MIN_MAX((%0, %1, 8))
 
         "movq %%mm7, %%mm4                      \n\t"
         "psrlq $8, %%mm7                        \n\t"
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         "pminub %%mm4, %%mm7                    \n\t" // min of pixels
         "pshufw $0xF9, %%mm7, %%mm4             \n\t"
         "pminub %%mm4, %%mm7                    \n\t" // min of pixels
@@ -1216,7 +1216,7 @@ FIND_MIN_MAX((%0, %1, 8))
 
         "movq %%mm6, %%mm4                      \n\t"
         "psrlq $8, %%mm6                        \n\t"
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         "pmaxub %%mm4, %%mm6                    \n\t" // max of pixels
         "pshufw $0xF9, %%mm6, %%mm4             \n\t"
         "pmaxub %%mm4, %%mm6                    \n\t"
@@ -1370,7 +1370,7 @@ DERING_CORE((%0, %1, 8)    ,(%%REGd, %1, 4),%%mm2,%%mm4,%%mm0,%%mm3,%%mm5,%%mm1,
         : : "r" (src), "r" ((x86_reg)stride), "m" (c->pQPb), "m"(c->pQPb2)
         : "%"REG_a, "%"REG_d, "%"REG_c
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
     int y;
     int min=255;
     int max=0;
@@ -1487,7 +1487,7 @@ DERING_CORE((%0, %1, 8)    ,(%%REGd, %1, 4),%%mm2,%%mm4,%%mm0,%%mm3,%%mm5,%%mm1,
 //        src[0] = src[7]=src[stride*7]=src[stride*7 + 7]=255;
     }
 #endif
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 #endif //HAVE_ALTIVEC
 
@@ -1499,7 +1499,7 @@ DERING_CORE((%0, %1, 8)    ,(%%REGd, %1, 4),%%mm2,%%mm4,%%mm0,%%mm3,%%mm5,%%mm1,
  */
 static inline void RENAME(deInterlaceInterpolateLinear)(uint8_t src[], int stride)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     src+= 4*stride;
     __asm__ volatile(
         "lea (%0, %1), %%"REG_a"                \n\t"
@@ -1552,7 +1552,7 @@ static inline void RENAME(deInterlaceInterpolateLinear)(uint8_t src[], int strid
  */
 static inline void RENAME(deInterlaceInterpolateCubic)(uint8_t src[], int stride)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     src+= stride*3;
     __asm__ volatile(
         "lea (%0, %1), %%"REG_a"                \n\t"
@@ -1594,7 +1594,7 @@ DEINT_CUBIC((%%REGd, %1), (%0, %1, 8) , (%%REGd, %1, 4), (%%REGc)    , (%%REGc,
         : : "r" (src), "r" ((x86_reg)stride)
         : "%"REG_a, "%"REG_d, "%"REG_c
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
     int x;
     src+= stride*3;
     for(x=0; x<8; x++){
@@ -1604,7 +1604,7 @@ DEINT_CUBIC((%%REGd, %1), (%0, %1, 8) , (%%REGd, %1, 4), (%%REGc)    , (%%REGc,
         src[stride*9] = CLIP((-src[stride*6] + 9*src[stride*8] + 9*src[stride*10] - src[stride*12])>>4);
         src++;
     }
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 
 /**
@@ -1616,7 +1616,7 @@ DEINT_CUBIC((%%REGd, %1), (%0, %1, 8) , (%%REGd, %1, 4), (%%REGc)    , (%%REGc,
  */
 static inline void RENAME(deInterlaceFF)(uint8_t src[], int stride, uint8_t *tmp)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     src+= stride*4;
     __asm__ volatile(
         "lea (%0, %1), %%"REG_a"                \n\t"
@@ -1665,7 +1665,7 @@ DEINT_FF((%%REGd, %1), (%%REGd, %1, 2), (%0, %1, 8) , (%%REGd, %1, 4))
         : : "r" (src), "r" ((x86_reg)stride), "r"(tmp)
         : "%"REG_a, "%"REG_d
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
     int x;
     src+= stride*4;
     for(x=0; x<8; x++){
@@ -1683,7 +1683,7 @@ DEINT_FF((%%REGd, %1), (%%REGd, %1, 2), (%0, %1, 8) , (%%REGd, %1, 4))
 
         src++;
     }
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 
 /**
@@ -1695,7 +1695,7 @@ DEINT_FF((%%REGd, %1), (%%REGd, %1, 2), (%0, %1, 8) , (%%REGd, %1, 4))
  */
 static inline void RENAME(deInterlaceL5)(uint8_t src[], int stride, uint8_t *tmp, uint8_t *tmp2)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     src+= stride*4;
     __asm__ volatile(
         "lea (%0, %1), %%"REG_a"                \n\t"
@@ -1755,7 +1755,7 @@ DEINT_L5(%%mm1, %%mm0, (%%REGd, %1, 2), (%0, %1, 8)    , (%%REGd, %1, 4))
         : : "r" (src), "r" ((x86_reg)stride), "r"(tmp), "r"(tmp2)
         : "%"REG_a, "%"REG_d
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
     int x;
     src+= stride*4;
     for(x=0; x<8; x++){
@@ -1784,7 +1784,7 @@ DEINT_L5(%%mm1, %%mm0, (%%REGd, %1, 2), (%0, %1, 8)    , (%%REGd, %1, 4))
 
         src++;
     }
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 
 /**
@@ -1796,7 +1796,7 @@ DEINT_L5(%%mm1, %%mm0, (%%REGd, %1, 2), (%0, %1, 8)    , (%%REGd, %1, 4))
  */
 static inline void RENAME(deInterlaceBlendLinear)(uint8_t src[], int stride, uint8_t *tmp)
 {
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     src+= 4*stride;
     __asm__ volatile(
         "lea (%0, %1), %%"REG_a"                \n\t"
@@ -1843,7 +1843,7 @@ static inline void RENAME(deInterlaceBlendLinear)(uint8_t src[], int stride, uin
         : : "r" (src), "r" ((x86_reg)stride), "r" (tmp)
         : "%"REG_a, "%"REG_d
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
     int a, b, c, x;
     src+= 4*stride;
 
@@ -1886,7 +1886,7 @@ static inline void RENAME(deInterlaceBlendLinear)(uint8_t src[], int stride, uin
         src += 4;
         tmp += 4;
     }
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 
 /**
@@ -1897,9 +1897,9 @@ static inline void RENAME(deInterlaceBlendLinear)(uint8_t src[], int stride, uin
  */
 static inline void RENAME(deInterlaceMedian)(uint8_t src[], int stride)
 {
-#ifdef HAVE_MMX
+#ifd HAVE_MMX
     src+= 4*stride;
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
     __asm__ volatile(
         "lea (%0, %1), %%"REG_a"                \n\t"
         "lea (%%"REG_a", %1, 4), %%"REG_d"      \n\t"
@@ -2012,7 +2012,7 @@ MEDIAN((%%REGd, %1), (%%REGd, %1, 2), (%0, %1, 8))
 #endif //HAVE_MMX
 }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
 /**
  * transposes and shift the given 8x8 Block into dst1 and dst2
  */
@@ -2180,7 +2180,7 @@ static inline void RENAME(transpose2)(uint8_t *dst, int dstStride, uint8_t *src)
 #endif //HAVE_MMX
 //static long test=0;
 
-#ifndef HAVE_ALTIVEC
+#if !HAVE_ALTIVEC
 static inline void RENAME(tempNoiseReducer)(uint8_t *src, int stride,
                                     uint8_t *tempBlurred, uint32_t *tempBlurredPast, int *maxNoise)
 {
@@ -2191,7 +2191,7 @@ static inline void RENAME(tempNoiseReducer)(uint8_t *src, int stride,
 
 #define FAST_L2_DIFF
 //#define L1_DIFF //u should change the thresholds too if u try that one
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
     __asm__ volatile(
         "lea (%2, %2, 2), %%"REG_a"             \n\t" // 3*stride
         "lea (%2, %2, 4), %%"REG_d"             \n\t" // 5*stride
@@ -2479,7 +2479,7 @@ L2_DIFF_CORE((%0, %%REGc)  , (%1, %%REGc))
         :: "r" (src), "r" (tempBlurred), "r"((x86_reg)stride), "m" (tempBlurredPast)
         : "%"REG_a, "%"REG_d, "%"REG_c, "memory"
     );
-#else //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#else //HAVE_MMX2 || HAVE_3DNOW
 {
     int y;
     int d=0;
@@ -2562,11 +2562,11 @@ Switch between
         }
     }
 }
-#endif //defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#endif //HAVE_MMX2 || HAVE_3DNOW
 }
 #endif //HAVE_ALTIVEC
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
 /**
  * accurate deblock filter
  */
@@ -2970,7 +2970,7 @@ static av_always_inline void RENAME(do_a_deblock)(uint8_t *src, int step, int st
             "movq (%%"REG_c"), %%mm2                \n\t" // 2L0 - 5L1 + 5L2 - 2L3
             "movq 8(%%"REG_c"), %%mm3               \n\t" // 2H0 - 5H1 + 5H2 - 2H3
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
             "movq %%mm7, %%mm6                      \n\t" // 0
             "psubw %%mm0, %%mm6                     \n\t"
             "pmaxsw %%mm6, %%mm0                    \n\t" // |2L4 - 5L5 + 5L6 - 2L7|
@@ -3002,7 +3002,7 @@ static av_always_inline void RENAME(do_a_deblock)(uint8_t *src, int step, int st
             "psubw %%mm6, %%mm3                     \n\t" // |2H0 - 5H1 + 5H2 - 2H3|
 #endif
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
             "pminsw %%mm2, %%mm0                    \n\t"
             "pminsw %%mm3, %%mm1                    \n\t"
 #else
@@ -3066,7 +3066,7 @@ static av_always_inline void RENAME(do_a_deblock)(uint8_t *src, int step, int st
             "pand %%mm2, %%mm4                      \n\t"
             "pand %%mm3, %%mm5                      \n\t"
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
             "pminsw %%mm0, %%mm4                    \n\t"
             "pminsw %%mm1, %%mm5                    \n\t"
 #else
@@ -3116,18 +3116,18 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
 static inline void RENAME(blockCopy)(uint8_t dst[], int dstStride, const uint8_t src[], int srcStride,
                                      int levelFix, int64_t *packedOffsetAndScale)
 {
-#ifndef HAVE_MMX
+#if !HAVE_MMX
     int i;
 #endif
     if(levelFix){
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(
         "movq (%%"REG_a"), %%mm2        \n\t" // packedYOffset
         "movq 8(%%"REG_a"), %%mm3       \n\t" // packedYScale
         "lea (%2,%4), %%"REG_a"         \n\t"
         "lea (%3,%5), %%"REG_d"         \n\t"
         "pxor %%mm4, %%mm4              \n\t"
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 #define REAL_SCALED_CPY(src1, src2, dst1, dst2)                                                \
         "movq " #src1 ", %%mm0          \n\t"\
         "movq " #src1 ", %%mm5          \n\t"\
@@ -3203,7 +3203,7 @@ SCALED_CPY((%%REGa, %4), (%%REGa, %4, 2), (%%REGd, %5), (%%REGd, %5, 2))
                 &(src[srcStride*i]), BLOCK_SIZE);
 #endif //HAVE_MMX
     }else{
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(
         "lea (%0,%2), %%"REG_a"                 \n\t"
         "lea (%1,%3), %%"REG_d"                 \n\t"
@@ -3243,7 +3243,7 @@ SIMPLE_CPY((%%REGa, %2), (%%REGa, %2, 2), (%%REGd, %3), (%%REGd, %3, 2))
  */
 static inline void RENAME(duplicate)(uint8_t src[], int stride)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(
         "movq (%0), %%mm0               \n\t"
         "add %1, %0                     \n\t"
@@ -3280,7 +3280,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
     int QPCorrecture= 256*256;
 
     int copyAhead;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     int i;
 #endif
 
@@ -3293,7 +3293,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
     uint8_t * const tempDst= dstStride > 0 ? c.tempDst : c.tempDst - 23*dstStride;
     //const int mbWidth= isColor ? (width+7)>>3 : (width+15)>>4;
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
     for(i=0; i<57; i++){
         int offset= ((i*c.ppMode.baseDcDiff)>>8) + 1;
         int threshold= offset*2 + 1;
@@ -3351,7 +3351,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
 
         scale= (double)(c.ppMode.maxAllowedY - c.ppMode.minAllowedY) / (double)(white-black);
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         c.packedYScale= (uint16_t)(scale*256.0 + 0.5);
         c.packedYOffset= (((black*c.packedYScale)>>8) - c.ppMode.minAllowedY) & 0xFFFF;
 #else
@@ -3384,7 +3384,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
         // with the L1 Cache of the P4 ... or only a few blocks at a time or soemthing
         for(x=0; x<width; x+=BLOCK_SIZE){
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 /*
             prefetchnta(srcBlock + (((x>>2)&6) + 5)*srcStride + 32);
             prefetchnta(srcBlock + (((x>>2)&6) + 6)*srcStride + 32);
@@ -3411,7 +3411,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
                 : "%"REG_a, "%"REG_d
             );
 
-#elif defined(HAVE_3DNOW)
+#elif HAVE_3DNOW
 //FIXME check if this is faster on an 3dnow chip or if it is faster without the prefetch or ...
 /*          prefetch(srcBlock + (((x>>3)&3) + 5)*srcStride + 32);
             prefetch(srcBlock + (((x>>3)&3) + 9)*srcStride + 32);
@@ -3457,7 +3457,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
         //1% speedup if these are here instead of the inner loop
         const uint8_t *srcBlock= &(src[y*srcStride]);
         uint8_t *dstBlock= &(dst[y*dstStride]);
-#ifdef HAVE_MMX
+#if HAVE_MMX
         uint8_t *tempBlock1= c.tempBlocks;
         uint8_t *tempBlock2= c.tempBlocks + 8;
 #endif
@@ -3493,7 +3493,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
         // with the L1 Cache of the P4 ... or only a few blocks at a time or soemthing
         for(x=0; x<width; x+=BLOCK_SIZE){
             const int stride= dstStride;
-#ifdef HAVE_MMX
+#if HAVE_MMX
             uint8_t *tmpXchg;
 #endif
             if(isColor){
@@ -3507,7 +3507,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
                 yHistogram[ srcBlock[srcStride*12 + 4] ]++;
             }
             c.QP= QP;
-#ifdef HAVE_MMX
+#if HAVE_MMX
             __asm__ volatile(
                 "movd %1, %%mm7         \n\t"
                 "packuswb %%mm7, %%mm7  \n\t" // 0, 0, 0, QP, 0, 0, 0, QP
@@ -3520,7 +3520,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
 #endif
 
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 /*
             prefetchnta(srcBlock + (((x>>2)&6) + 5)*srcStride + 32);
             prefetchnta(srcBlock + (((x>>2)&6) + 6)*srcStride + 32);
@@ -3547,7 +3547,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
                 : "%"REG_a, "%"REG_d
             );
 
-#elif defined(HAVE_3DNOW)
+#elif HAVE_3DNOW
 //FIXME check if this is faster on an 3dnow chip or if it is faster without the prefetch or ...
 /*          prefetch(srcBlock + (((x>>3)&3) + 5)*srcStride + 32);
             prefetch(srcBlock + (((x>>3)&3) + 9)*srcStride + 32);
@@ -3591,12 +3591,12 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
                 }
             }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
             RENAME(transpose1)(tempBlock1, tempBlock2, dstBlock, dstStride);
 #endif
             /* check if we have a previous block to deblock it with dstBlock */
             if(x - 8 >= 0){
-#ifdef HAVE_MMX
+#if HAVE_MMX
                 if(mode & H_X1_FILTER)
                         RENAME(vertX1Filter)(tempBlock1, 16, &c);
                 else if(mode & H_DEBLOCK){
@@ -3617,7 +3617,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
                 if(mode & H_X1_FILTER)
                     horizX1Filter(dstBlock-4, stride, QP);
                 else if(mode & H_DEBLOCK){
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
                     DECLARE_ALIGNED(16, unsigned char, tempBlock[272]);
                     transpose_16x8_char_toPackedAlign_altivec(tempBlock, dstBlock - (4 + 1), stride);
 
@@ -3659,7 +3659,7 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
             dstBlock+=8;
             srcBlock+=8;
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
             tmpXchg= tempBlock1;
             tempBlock1= tempBlock2;
             tempBlock2 = tmpXchg;
@@ -3699,9 +3699,9 @@ static void RENAME(postProcess)(const uint8_t src[], int srcStride, uint8_t dst[
                 + dstBlock[x +14*dstStride] + dstBlock[x +15*dstStride];
         }*/
     }
-#ifdef HAVE_3DNOW
+#if   HAVE_3DNOW
     __asm__ volatile("femms");
-#elif defined (HAVE_MMX)
+#elif HAVE_MMX
     __asm__ volatile("emms");
 #endif